How do you undo a commit change in git?

Related questions

1. How do I undo last commit?
2. How do I uninstall stash?
3. What does git diff do?
4. What is stored in a git commit?
5. How do I stash new files in git?
6. What is git clean?
7. Will git fetch overwrite local changes?
8. What is the difference between git add and git commit?
9. What is git remote add?
10. What is difference between pull and fetch?

Tags

1. #updated
2. #simply
3. #commit
4. #separately
5. #pulled
6. #branch
7. #cherry
8. #haven
9. #other
10. #repository
11. #revert
12. #perform
13. #commits
14. #reverse
15. #changes
16. #shared
17. #history