How to Commit in GIT

git commit -m <message>

git commit --amend

E.g.

git commit -m 'sample commit'

git add forgotten-file

git commit --amend

git reset

Undo git commit (changes get unstaged i.e. after modification, we need to re-add, re-commit)

git reset HEAD~

Undo git commit (changes remain staged i.e. after modification, we need to re-commit only) -- useful when we need to change only commit message

git reset --soft HEAD~

Above commands are like moving commit pointer to 1 back position. In case, we want to undo multiple commits, we can use like below

git reset HEAD~3 -> * Undoes 3 commits (changes get unstaged)

git reset --soft HEAD~3 -> * Undoes 3 commits (changes remain staged)