$ git clone -n https://gitee.com/bluevalley/grub2.git /var/lib/mock/dist-an23-build-441140-73164/root/chroot_tmpdir/scmroot/grub2
Cloning into '/var/lib/mock/dist-an23-build-441140-73164/root/chroot_tmpdir/scmroot/grub2'...
$ git fetch origin 20f9ddd2a13ce11623fde054cd4930fdf1bd4b4d:KOJI_FETCH_HEAD
From https://gitee.com/bluevalley/grub2
 * [new ref]         20f9ddd2a13ce11623fde054cd4930fdf1bd4b4d -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 20f9ddd Use proper memory type for kernel allocation