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Git Mastery: From First Commit to Expert

The Complete Practical Guide — Fundamentals, Workflows, Internals, and Real-World Problem Solving

Git Mastery: From First Commit to Expert
This book is 100% completeLast updated on 2026-10-17
Steve Publications

Stop memorizing Git commands and learn how Git actually works. Git Mastery: From First Commit to Expert covers everything from version control basics to advanced workflows, debugging and Git internals with practical examples that help you collaborate with confidence and solve Git problems on your own.

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About the Book

This book takes you from your very first `git init` to the deepest corners of Git's internals. You will learn not just what commands to run, but why they work the way they do. Through practical scenarios, step-by-step examples, hands-on exercises with solutions, and real-world troubleshooting, you will develop the deep understanding that separates a confident developer from one who is always Googling error messages. Whether you are preparing for technical interviews, managing a team's workflow, or simply tired of losing work to `git reset --hard`, this guide gives you the tools and mental model to master Git once and for all.

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Steve Publications

Steve is a technology professional with more than 20 years of experience spanning software development, server infrastructure, cybersecurity, vulnerability research and reverse engineering. His work focuses on understanding complex systems, uncovering security weaknesses and developing practical solutions that make technology more secure, reliable and effective.

Through Steve Publications, he collaborates with experienced researchers, engineers and industry experts to create practical, technically rigorous books on various topics not limited to self-improvement, software development, cybersecurity, cloud computing, DevOps, artificial intelligence and enterprise technologies. His mission is to make complex technical subjects accessible through clear explanations, real-world examples and hands-on exercises that help IT professionals, students and technology enthusiasts build valuable, practical skills.

Steve Publications embraces AI as a supporting tool for translation, proofreading and editorial refinement, not as a substitute for original research, technical expertise, or hands-on experience. Some contributors choose to publish under pseudonyms to protect their privacy or maintain professional boundaries.

Behind every book is a commitment to technical accuracy, practical relevance and continuous improvement. Our publications are written, reviewed and maintained by experienced professionals, with support from a private community of more than 420 engineers and researchers. Rather than prioritizing volume or mass-produced AI-generated content, we focus on delivering reliable, useful resources that readers can apply in real-world environments.

We also welcome experienced professionals who want to share their knowledge by writing or reviewing books, particularly in specialized and emerging technology fields. If you have expertise to contribute, we invite you to get in touch and explore opportunities to collaborate.

Our commitment is simple: To deliver books that respect our readers' time, support their professional growth and provide lasting practical value. If a book does not meet your expectations, Leanpub offers a 60-day money-back guarantee.

Contents

Table of Contents

The Complete Practical Guide: Fundamentals, Workflows, Internals and Real-World Problem Solving

Introduction

Chapter 1: The Git Mental Model

  1. The Version Control Landscape
  2. The Directed Acyclic Graph
  3. The Three-Tree Model
  4. Object Types: Blob, Tree, Commit, Tag
  5. References: Branches, Tags and HEAD

Chapter 2: Installation and Configuration

  1. Installing Git
  2. The Config Layers: System, Global, Local
  3. Identity and Email
  4. Authentication: SSH vs HTTPS
  5. Essential Settings

Chapter 3: Your First Repository

  1. Initializing a Repository
  2. The Add/Commit Cycle
  3. Viewing History
  4. Undoing Mistakes
  5. Hands-On Exercise: Build a Tiny Project

Chapter 4: Commits and History Management

  1. Commit Anatomy
  2. Amending and Rewriting
  3. Interactive Rebase Deep Dive
  4. Cherry-Pick: Applying Individual Commits
  5. Commit Messages That Matter
  6. Hands-On Exercise: Amend and Rewrite a Commit

Chapter 5: Branching and Merging

  1. Creating and Switching Branches
  2. Merge Strategies: Fast-Forward vs Recursive vs Octopus
  3. Merge Conflicts: What Causes Them and How to Resolve
  4. Three-Way Merge Explained
  5. Hands-On Exercise: Simulate a Real Merge Conflict

Chapter 6: Rebasing and Linear History

  1. Why Rebase? Clean History vs Merge Commits
  2. Interactive Rebase in Practice
  3. Rebase Conflicts: How They Differ from Merge Conflicts
  4. Walkthrough: Resolving a Rebase Conflict Step by Step
  5. Hands-On Exercise: Clean Up a Messy History
  6. The Great Debate: Rebase vs Merge
  7. Hands-On Exercise: Rebase a Feature Branch

Chapter 7: Remotes and Collaboration

  1. Remote Mechanics: Fetch, Pull, Push
  2. Tracking Branches and Upstream/Downstream
  3. The Push/Pull Cycle
  4. Force Push Dangers
  5. Pull Requests and Code Review
  6. Hands-On Exercise: Fork, Clone, Branch, Commit, Push and PR

Chapter 8: Advanced Branching Workflows

  1. Git Flow: The Classic Model
  2. Trunk-Based Development: The Modern Approach
  3. Feature Flags and Deployment
  4. Monorepos: Managing Multiple Projects in One Repo
  5. Choosing a Strategy

Chapter 9: Stashing, Tagging and Cleanup

  1. Stash Mechanics: Saving Changes Without Committing
  2. Patch Stashes: Stashing Selective Changes
  3. Tags: Lightweight vs Annotated
  4. Cleanup Commands
  5. Hands-On Exercise: Stash, Work on Another Branch, Apply

Chapter 10: Git Hooks and Automation

  1. Hook Types: Pre-Commit, Pre-Push, Commit-Message
  2. Writing Your First Hook
  3. Hook Templates: Sharing Hooks Across Repos
  4. CI/CD Integration
  5. Hands-On Exercise: Create a Pre-Commit Hook

Chapter 11: Submodules and Worktrees

  1. Submodule Mechanics: Add, Update, Clone
  2. Common Submodule Pitfalls
  3. Git Worktrees: The Modern Alternative
  4. When to Use Which
  5. Hands-On Exercise: Set Up a Repo with a Submodule and a Worktree

Chapter 12: Git Internals

  1. The Object Store: Blob, Tree, Commit, Tag in .git/objects
  2. SHA-1 and Content Addressing
  3. Packfiles and Compression
  4. The Reflog: Where Deleted Branches Go
  5. How git log Works Under the Hood
  6. Hands-On Exercise: Explore the Object Store with git cat-file

Chapter 13: Performance and Scale

  1. Large Repositories: What “Large” Means and Common Bottlenecks
  2. Shallow Clones: --depth and Trade-Offs
  3. Sparse Checkout: Checking Out Only What You Need
  4. Partial Clones: Skipping Large Blobs
  5. Bisection for Debugging: Finding Regressions Fast
  6. Performance Tuning: git config Options
  7. Hands-On Exercise: Use git bisect to Find a Regression

Chapter 14: Security and Best Practices

  1. Signed Commits: GPG and SSH Signing
  2. Secrets in History: Removal and Prevention
  3. Audit Trails and Compliance
  4. Security Scanning: Pre-Commit and CI Integration
  5. Hands-On Exercise: Remove a Committed Secret

Chapter 15: Troubleshooting and Recovery

  1. Lost Commits: The Reflog as Your Safety Net
  2. Corrupted Repositories: git fsck and Repair
  3. Common Error Patterns: Causes and Fixes
  4. Recovery Scenarios: Step-by-Step Procedures
  5. Hands-On Exercise: Simulate a Corrupted Repo and Recover

Conclusion: The Expert’s Mindset

References

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