$ git clone -n https://gitee.com/src-opencloudos-rpms/grub2.git /var/lib/mock/dist-oc9-build-246062-83425/root/chroot_tmpdir/scmroot/grub2
Cloning into '/var/lib/mock/dist-oc9-build-246062-83425/root/chroot_tmpdir/scmroot/grub2'...
$ git fetch origin 212f37537aca997d8c14c244da244545fdd7b3cf:KOJI_FETCH_HEAD
From https://gitee.com/src-opencloudos-rpms/grub2
 * [new ref]         212f37537aca997d8c14c244da244545fdd7b3cf -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 212f375 import grub2-2.12-20.tl4.ap.1