$ git clone -n https://gitee.com/opencloudos-stream/grub2.git /var/lib/mock/dist-ocs23-base-build-375314-47643/root/chroot_tmpdir/scmroot/grub2
Cloning into '/var/lib/mock/dist-ocs23-base-build-375314-47643/root/chroot_tmpdir/scmroot/grub2'...
$ git fetch origin master:KOJI_FETCH_HEAD
From https://gitee.com/opencloudos-stream/grub2
 * [new branch]      master     -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at eaa6091 !28 efi: Stop embedding memdisk.squashfs in EFI core images Merge pull request !28 from 冯玮耀/master