Pulls the HEAD branch of all git repos in a directory and deletes branches which are no longer on remote

pull-all-heads.sh

for gitDir in *; do
  headBranch=$(git -C "$gitDir" symbolic-ref --short HEAD)
  git -C "$gitDir" checkout "$headBranch"
  git -C "$gitDir" pull
  
  for branch in $(git -C "$gitDir" for-each-ref --format '%(refname) %(upstream:track)' refs/heads | awk '$2 == "[gone]" {sub("refs/heads/", "", $1); print $1}'); do
    git branch -D $branch
  done
done