git checkout

$ git status
On branch master
Changes not staged for commit:
(use "git add …" to update what will be committed)
(use "git checkout — …" to discard changes in working directory)

modified: index.html

no changes added to commit (use "git add" and/or "git commit -a")

barzik@BARZIK2 MINGW64 ~/test/examplegit (master)
$ git checkout .

barzik@BARZIK2 MINGW64 ~/test/examplegit (master)
$ git status
On branch master
nothing to commit, working directory clean