$ git clone -n https://gitee.com/src-opencloudos-rpms/grub2.git /var/lib/mock/dist-oc9-build-119345-70326/root/chroot_tmpdir/scmroot/grub2
Cloning into '/var/lib/mock/dist-oc9-build-119345-70326/root/chroot_tmpdir/scmroot/grub2'...
$ git fetch origin 6f218316efdc4b76ada334ffc27f36cd34a1c18b:KOJI_FETCH_HEAD
From https://gitee.com/src-opencloudos-rpms/grub2
 * [new ref]         6f218316efdc4b76ada334ffc27f36cd34a1c18b -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 6f21831 import grub2-2.12-8.tl4