Git Logic Puzzles: Predict the Output

Most developers learn Git by doing — running a command, seeing what happens, moving on. It works until it doesn’t: a reset goes one commit too far, a merge lands somewhere unexpected, and the difference between knowing Git and guessing at Git becomes expensive. This book closes that gap. 120 challenges across 22 topic areas — the index and staging, log and ranges, remotes and tracking branches, diff, reset, restore, stash, tags, worktrees, detached HEAD. Each puzzle is one page: a repository shown as a real commit graph, a short sequence of commands, and one question with one right answer. Every answer was produced by running the command against Git 2.43 in a controlled environment. No terminal in the book — running a command tells you what happened; predicting it first is what builds the instinct that catches the mistake before it lands.