$ git clone -n https://gitee.com/gcdota930915/grub2.git /var/lib/mock/dist-an23-build-548253-87757/root/chroot_tmpdir/scmroot/grub2
Cloning into '/var/lib/mock/dist-an23-build-548253-87757/root/chroot_tmpdir/scmroot/grub2'...
$ git reset --hard 428cc8518f7021ff7ddaec4cece3562b7bc5eeb0
HEAD is now at 428cc85 Backport upstream 569214e2: fix GRUB ext2 driver misreading ext4 external extent tree (>4 extents)