$ git clone -n https://gitee.com/gcdota930915/grub2.git /var/lib/mock/dist-an23-build-545024-86953/root/chroot_tmpdir/scmroot/grub2
Cloning into '/var/lib/mock/dist-an23-build-545024-86953/root/chroot_tmpdir/scmroot/grub2'...
$ git fetch origin a64ab5d0160e28b77003e593c09983d359f7ed45:KOJI_FETCH_HEAD
From https://gitee.com/gcdota930915/grub2
 * [new ref]         a64ab5d0160e28b77003e593c09983d359f7ed45 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at a64ab5d [Plan B] efi: Add NX memory attributes for kernel loaders (unified path)