$ git clone -n https://gitee.com/src-opencloudos-rpms/grub2.git /var/lib/mock/dist-oc9-build-138091-79636/root/chroot_tmpdir/scmroot/grub2
Cloning into '/var/lib/mock/dist-oc9-build-138091-79636/root/chroot_tmpdir/scmroot/grub2'...
$ git fetch origin ff37caf792a6cf53ec0ba31c029e10bf856e7f8b:KOJI_FETCH_HEAD
From https://gitee.com/src-opencloudos-rpms/grub2
 * [new ref]         ff37caf792a6cf53ec0ba31c029e10bf856e7f8b -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at ff37caf import grub2-2.12-16.tl4.ap.1