Undo last local commit but keep files changes.

git reset HEAD~1

• All the changes committed in the last commit is present in the local repo.
• Changes are not present in stage.

Undo last local commit and keep files changes in stage.

git reset --soft HEAD~1

• No need to do git add again to add the changes to stage.

Undo last local commit and remove the changes from the repository.

git reset --hard HEAD~1

• Git commit has been reversed.
• The changes also removed from the local repository.
• This option can be used before start using the branch. Just to make sure the branch is clean before making changes.