$ git clone -n https://git.cclinux.org/stage/rpms/grub2.git /mnt/compose/mock/dist-circle8-build-118299-81075/root/chroot_tmpdir/scmroot/grub2
Cloning into '/mnt/compose/mock/dist-circle8-build-118299-81075/root/chroot_tmpdir/scmroot/grub2'...
$ git fetch origin b7acc551c9fa7d84b6c4e8f1c77c6845d5dc6ac5:KOJI_FETCH_HEAD
From https://git.cclinux.org/stage/rpms/grub2
 * [new ref]         b7acc551c9fa7d84b6c4e8f1c77c6845d5dc6ac5 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at b7acc55 import grub2-2.02-156.el8