git remote prune origin
Remove stale remote-tracking branches.
This command deletes remote-tracking branches that no longer exist on the remote repository named origin.
It helps clean up outdated branches that have been removed from the remote repository, ensuring your local repository stays in sync with the remote.
Variations include using git remote prune <remote_name> to target a different remote, or git remote prune -n origin for a dry-run to see what would be pruned without actually removing anything.