Remove old git remote branches

git_remove_origin.sh

#!/bin/bash
# run with caution! Change the date on line 4 
for k in $(git branch -r | sed /\*/d); do 
  if [ -z "$(git log -1 --since='2 month ago' -s $k)" ]; then
    branch_name_with_no_origin=$(echo $k | sed -e "s/origin\///")
    echo deleting branch: $branch_name_with_no_origin
    git push origin --delete $branch_name_with_no_origin
  fi
done