Answer by Asped for How do I discard unstaged changes in Git?

You can use git stash - if something goes wrong, you can still revert from the stash. Similar to some other answer here, but this one also removes all unstaged files and also all unstaged deletes:

git add .
git stash

if you check that everything is OK, throw the stash away:

git stash drop

The answer from Bilal Maqsood with git clean also worked for me, but with the stash I have more control - if I do sth accidentally, I can still get my changes back

UPDATE

I think there is 1 more change (don't know why this worked for me before):

git add . -A instead of git add .

without the -A the removed files will not be staged