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Git Reset vs Revert vs Checkout: Difference Explained

Quick Answer: All three commands undo changes in Git, but operate on different scopes:

git reset rewinds history by moving the branch pointer backwards (best for local, unpushed commits).
git revert creates a new commit that undoes a previous commit’s changes (best for pushed/public commits).
git checkout moves HEAD to a different branch/commit or restores working tree files without altering commit history.

Comparison Cheat Sheet

Command	Moves Branch Pointer?	Creates New Commit?	Safe for Pushed Commits?	Target Scope
`git reset`	✅ Yes	❌ No	❌ No (rewrites history)	Local branch pointer & index
`git revert`	❌ No	✅ Yes	✅ Yes (100% safe for remote)	Create inverse commit
`git checkout`	❌ No	❌ No	✅ Yes	Switch branch / inspect file

1. `git reset` — Rewind Branch History

git reset moves your current branch pointer backward in time.

# Soft: Rewind branch pointer, keep code staged
$ git reset --soft HEAD~1

# Mixed (default): Rewind branch pointer, unstage code
$ git reset --mixed HEAD~1

# Hard: Rewind branch pointer & erase all uncommitted edits
$ git reset --hard HEAD~1

When to use: Local commits you haven’t pushed to GitHub yet. Read /git-add to understand how reset affects index entries.

2. `git revert` — Undo Changes Safely on Shared Branches

Instead of erasing history, git revert calculates the inverse diff of a commit and commits that inverse as a brand-new commit.

# Undo the last commit safely on public branches
$ git revert HEAD

# Undo a specific past commit
$ git revert a1b2c3d

When to use: Undoing changes that have already been pushed to a remote repository shared with team members.

3. `git checkout` — Switch Context or Inspect Files

git checkout alters where HEAD points or replaces files in your working directory.

# Switch active branch
$ git checkout feature

# Inspect a past commit in detached HEAD state
$ git checkout a1b2c3d

# Restore a single modified file to its last committed state
$ git checkout -- src/app.js

When to use: Navigating between branches or inspecting historical snapshots. Read /git-checkout for deeper details.

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