Have you ever ran
git branch and realized you have hundreds of old branches on your local machine? This is a super easy way to clean those up.
If you run
git config -e --global then paste this in there:
[alias] cleanup = "!git branch --merged | grep -v '\\*\\|master\\|develop' | xargs -n 1 git branch -d"
Then you will be able to run
git cleanup and it will delete all local branches that have already been merged! Beautiful!
Credit goes to real_ate on this stackoverflow post