GIT add revert in my case (keep changes)

You can use git reset

git reset -- FILE_NAME will do it.

See the git reset manual:

This means that git reset <pathspec> is the opposite of git add <pathspec>

you could use

git reset --mixed -- <filename>

if you use --hard, you would discard all your changes.

git stash save 
git stash apply

they will all be unstaged

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