a quick way to clean-up local branches which no longer exist remotely

git-cleanup

git fetch --all -p; git branch -vv | grep ": gone]" | awk '{ print $1 }' | xargs -n 1 git branch -d

the above command will show which will be deleted. use -D instead of -d to delete them all
tested and works
does not delete local branches which only exist locally and have never existed remotely.

a better version would test whether the branch creates a diff or pr. ie. it's been merged.