$ git clone -n https://gitee.com/src-opencloudos-rpms/grub2.git /var/lib/mock/dist-oc9-pre-build-238627-82547/root/chroot_tmpdir/scmroot/grub2
Cloning into '/var/lib/mock/dist-oc9-pre-build-238627-82547/root/chroot_tmpdir/scmroot/grub2'...
$ git fetch origin 5cef360ea9c872a80f0bb0afdffa60919792d0fc:KOJI_FETCH_HEAD
From https://gitee.com/src-opencloudos-rpms/grub2
 * [new ref]         5cef360ea9c872a80f0bb0afdffa60919792d0fc -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 5cef360 import grub2-2.12-19.tl4.ap.1