how to delete the local branches which are deleted from remote code example
Example: delete local branches not on remote
git branch -vv | grep ': gone]'| grep -v "\*" | awk '{ print $1; }' | xargs -r git branch -Dgit branch -vv | grep ': gone]'| grep -v "\*" | awk '{ print $1; }' | xargs -r git branch -D