$ git clone -n https://src.fedoraproject.org/rpms/gnome-shell-extension-caffeine.git /var/lib/mock/f45-build-11489-432/root/chroot_tmpdir/scmroot/gnome-shell-extension-caffeine
Cloning into '/var/lib/mock/f45-build-11489-432/root/chroot_tmpdir/scmroot/gnome-shell-extension-caffeine'...
$ git fetch origin c85a3435b20a0056bbe3506b3a356bc0aff12fd0:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/gnome-shell-extension-caffeine
 * [new ref]         c85a3435b20a0056bbe3506b3a356bc0aff12fd0 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at c85a343 Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild