How to undo all changes (not indexed) in a project, (git)?

Question

git

Good afternoon, how to undo all non-indexed local changes in a project?
I know how to undo only one file at a time, like this git checkout .
But I need something like this git add -A just for checkout. Well, or for a whole directory, for example ....
Who knows, please tell me, otherwise it is very painful to roll back dozens of files ...

Answer 1

git reset --hard
https://git-scm.com/docs/git-reset