git-local-branches-deletion.md

List local stale branches:

git branch -vv | grep 'gone' | awk '{print $1}'

List and delete local stale branches

git branch -vv | grep "gone" | awk '{print $1}' | xargs git branch --delete

You could even create an alias on your machine. Modify ~/.gitignore (user level, not repo):

[alias]
    stale-local-branches = "!git branch -vv | grep 'gone' | awk '{print $1}'"
    delete-stale-local = "!git stale-local-branches | xargs git branch --delete"