$ git clone -n https://gitee.com/src-opencloudos-rpms/grub2.git /var/lib/mock/dist-oc9-build-249719-83893/root/chroot_tmpdir/scmroot/grub2
Cloning into '/var/lib/mock/dist-oc9-build-249719-83893/root/chroot_tmpdir/scmroot/grub2'...
$ git fetch origin f3ca3329a96d5d97dcb8dee0c03ac94c3331a32b:KOJI_FETCH_HEAD
From https://gitee.com/src-opencloudos-rpms/grub2
 * [new ref]         f3ca3329a96d5d97dcb8dee0c03ac94c3331a32b -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at f3ca332 import grub2-2.12-23.tl4.ap.1