$ git clone -n https://gitee.com/src-opencloudos-rpms/grub2.git /var/lib/mock/dist-oc9-build-80852-54097/root/chroot_tmpdir/scmroot/grub2
Cloning into '/var/lib/mock/dist-oc9-build-80852-54097/root/chroot_tmpdir/scmroot/grub2'...
$ git fetch origin 45398ef37ab6a67be4f50762ca5b3b0b06455ce5:KOJI_FETCH_HEAD
From https://gitee.com/src-opencloudos-rpms/grub2
 * [new ref]         45398ef37ab6a67be4f50762ca5b3b0b06455ce5 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 45398ef import grub2-2.12-4.tl4