Reverting Changes

#	Command	Description
1	git checkout [commit-id]	This command allows you to view the contents of a previous snapshot.
2	git revert [commit-id]	Undo the existing commit by applying a new revert commit. Before this is applied it will show you the commit message which you can edit.
3	git reset	Unstage all tracked files.
4	git reset [file]	It allows you to undo the tracked file. It reverts git add [file]
5	git reset --hard	Removes all changes from the staging area.
6	git reset --hard HEAD~1	It will reset your branch to the previous commit, it will completely delete the commit and remove files from untracked files.
7	git clean -f	Remove untracked files.
8	git reset --hard / git clean -f	Permanently undo uncommitted changes.