$ git clone -n https://src.fedoraproject.org/rpms/gnome-shell-extension-bubblemail.git /var/lib/mock/f45-build-11487-432/root/chroot_tmpdir/scmroot/gnome-shell-extension-bubblemail
Cloning into '/var/lib/mock/f45-build-11487-432/root/chroot_tmpdir/scmroot/gnome-shell-extension-bubblemail'...
$ git fetch origin e9b84f1366a642818dd49d73ffa9962e417e828b:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/gnome-shell-extension-bubblemail
 * [new ref]         e9b84f1366a642818dd49d73ffa9962e417e828b -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at e9b84f1 Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild