When you local repository fails to remove invalid remote referneces

remove-invalid-remote-refs-git.sh

# The symptoms. When you do this, you keep on getting new and deleted branches all the time
git remote update
git pull

# Symptom 2 (for obvious reasons).

git branch -a --merged # Check the merged branches
git push origin --delete [branch name] # this complains remote doesn't exist

# The remedy
git remote prune origin # Remove all the stale references from remote