Git delete old branches
Over time in a project you end up with a lot of old branches. If you want to do some house keeping and only keep branches that exists on the remote server you can follow along.
Make sure you don't have any local work you want to keep on a brach that has not been pushed.
Deleting local branches
First you want to delete all local branches, except
git branch | grep -v "main" | xargs git branch -D
Deliting remote branches
git remote prune origin
Now you are only left with
main and the remote-tracking branches that actually exists in the remote repository. You can see them with:
git branch -a