$ git clone -n https://gitee.com/gcdota930915/grub2.git /var/lib/mock/dist-an23-build-549728-88495/root/chroot_tmpdir/scmroot/grub2
Cloning into '/var/lib/mock/dist-an23-build-549728-88495/root/chroot_tmpdir/scmroot/grub2'...
$ git fetch origin cf7863a4044998f49c432fa53107d6c8f5c1341b:KOJI_FETCH_HEAD
From https://gitee.com/gcdota930915/grub2
 * [new ref]         cf7863a4044998f49c432fa53107d6c8f5c1341b -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at cf7863a nx: set NX compatible flag in EFI images