$ git clone -n https://gitee.com/gcdota930915/grub2.git /var/lib/mock/dist-an23-build-548431-87757/root/chroot_tmpdir/scmroot/grub2
Cloning into '/var/lib/mock/dist-an23-build-548431-87757/root/chroot_tmpdir/scmroot/grub2'...
$ git fetch origin 1cffeddd23691102a116449b3c40bdc545603f16:KOJI_FETCH_HEAD
From https://gitee.com/gcdota930915/grub2
 * [new ref]         1cffeddd23691102a116449b3c40bdc545603f16 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 1cffedd Revert Patch1028: fs/ext2 OOB read fix causes functional regression