$ git clone -n https://gitee.com/src-opencloudos-rpms/grub2.git /var/lib/mock/dist-oc9-build-253613-84314/root/chroot_tmpdir/scmroot/grub2
Cloning into '/var/lib/mock/dist-oc9-build-253613-84314/root/chroot_tmpdir/scmroot/grub2'...
$ git fetch origin 4478972e794d16b752bfba188806500903ebfff1:KOJI_FETCH_HEAD
From https://gitee.com/src-opencloudos-rpms/grub2
 * [new ref]         4478972e794d16b752bfba188806500903ebfff1 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 4478972 import grub2-2.12-23.tl4.ap.2