$ git clone -n https://gitee.com/gcdota930915/grub2.git /var/lib/mock/dist-an23-build-548169-87716/root/chroot_tmpdir/scmroot/grub2
Cloning into '/var/lib/mock/dist-an23-build-548169-87716/root/chroot_tmpdir/scmroot/grub2'...
$ git reset --hard b652aa57fa4cc3e09a18c4a447c522d10cd096ff
HEAD is now at b652aa5 Backport upstream 569214e2: fix GRUB ext2 driver misreading ext4 external extent tree (>4 extents)