how to undo changes in a specific file in git code example

Example 1: how to remove file changes in git

git clean -df
git checkout -- .

Example 2: git abort changes

git stash save --keep-index --include-untracked
You don't need to include --include-untracked if you don't want to be thorough about it.

After that, you can drop that stash with a git stash drop command if you like.