$ git clone -n https://gitee.com/src-opencloudos-rpms/grub2.git /var/lib/mock/dist-oc9-build-136963-79436/root/chroot_tmpdir/scmroot/grub2
Cloning into '/var/lib/mock/dist-oc9-build-136963-79436/root/chroot_tmpdir/scmroot/grub2'...
$ git fetch origin 46e6cb25d2bbd78820c9f155ed765a2d09af5899:KOJI_FETCH_HEAD
From https://gitee.com/src-opencloudos-rpms/grub2
 * [new ref]         46e6cb25d2bbd78820c9f155ed765a2d09af5899 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 46e6cb2 import grub2-2.12-14.tl4.ap.1