Imagine you just realized you added a long time ago in your git repository some files that don’t belong here, like ./target.
Use filter-repo to get rid of them
sudo apt install git-filter-repo
Get a fresh clone
git clone url/repo && cd repo
Then, rewrite the history to remove the target path
git filter-repo --path target --invert-match
Then push the result back
git remote add origin url/repo
git push --force-with-lease origin branch branch
Warn other people on your team so that they won’t mistakenly merge their old history with the new one and push back the old content.
base="$(git merge-base origin/mybranch mybranch)"
git fetch
git rebase $base mybranch --onto origin/mybranch