Answer by A H M Forhadul Islam for How do I discard unstaged changes in Git?

The easiest way to do this is by using this command:

This command is used to discard changes in working directory -

git checkout -- .

https://git-scm.com/docs/git-checkout

In git command, stashing of untracked files is achieved by using:

git stash -u

http://git-scm.com/docs/git-stash