Fix #3228: 'Failed to fetch from upstream' on doom upgrade
Fix #3228: 'Failed to fetch from upstream' on doom upgrade

Due to git name-rev returning fully qualified refs in some cases.

hlissner/.emacs.d,hlissner/doom-emacs,hlissner/.emacs.d,hlissner/.emacs.d,hlissner/.emacs.d,hlissner/.emacs.d,hlissner/doom-emacs,hlissner/.emacs.d,hlissner/.emacs.d,hlissner/doom-emacs,hlissner/doom-emacs,hlissner/doom-emacs,hlissner/doom-emacs,hlissner/.emacs.d,hlissner/doom-emacs