$ git clone -n https://gitee.com/gcdota930915/grub2.git /var/lib/mock/dist-an23-build-546894-87480/root/chroot_tmpdir/scmroot/grub2
Cloning into '/var/lib/mock/dist-an23-build-546894-87480/root/chroot_tmpdir/scmroot/grub2'...
$ git fetch origin 6eae347b91afc040c3e6278d6de014481cea862a:KOJI_FETCH_HEAD
From https://gitee.com/gcdota930915/grub2
 * [new ref]         6eae347b91afc040c3e6278d6de014481cea862a -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 6eae347 nx: replace CR4.NXE workaround with proper per-section NX attrs