Automatically prune remote branches when fetching
Automatically prune remote branches when fetching

* Removes the need to occasionally run `git remote prune`.
* Remove branches when fetching instead of deleting other branches.

https://trello.com/c/ePlghTll/249-configure-git-to-prune-on-fetch

danbee/old-dotfiles,danbee/dotfiles,danbee/dotfiles,danbee/old-dotfiles