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Git Mastery: From First Commit to Expert

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

This book is 100% completeLast updated on 2026-07-13
Steve T. Publications
Here's a short teaser: Stop memorizing Git commands and start understanding Git. Git Mastery: From First Commit to Expert takes you on a practical journey from basic version control to advanced workflows, debugging, and Git internals. Through hands-on examples, real-world scenarios, and clear explanations of how Git actually works under the hood, you'll gain the confidence to collaborate…

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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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About the Author

Steve T. Publications

Steve T. is a technology professional with over 20 years of experience spanning software development, server infrastructure operations, cybersecurity, vulnerability research and reverse engineering. Throughout his career, he has built extensive expertise in designing, securing, analyzing and testing complex systems with a strong focus on identifying and understanding software and infrastructure vulnerabilities.

He currently serves in the advanced research organization of a leading cybersecurity company where he conducts advanced cybersecurity and vulnerability research alongside a team of highly skilled researchers and engineers. His work focuses on discovering and analyzing security vulnerabilities, reverse engineering software and malware, evaluating emerging threats and developing innovative techniques to strengthen the security and resilience of modern computing environments.

Outside of his professional responsibilities, Steve is passionate about sharing knowledge with the global technology community. In his free time, he collaborates with fellow researchers, industry experts and technology professionals to write practical, in-depth technical books covering a broad range of IT disciplines, including software development, cybersecurity, cloud computing, networking, DevOps, artificial intelligence and enterprise technologies.

His publications are designed to make complex technical concepts accessible through clear explanations, real-world examples, and hands-on guidance. Drawing on more than two decades of industry experience, Steve is committed to helping IT professionals, students, educators and technology enthusiasts develop practical skills and stay current with the rapidly evolving technology landscape.

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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