$ git clone -n https://gitee.com/src-opencloudos-rpms/diffutils.git /var/lib/mock/dist-oc9-build-64104-16463/root/chroot_tmpdir/scmroot/diffutils
Cloning into '/var/lib/mock/dist-oc9-build-64104-16463/root/chroot_tmpdir/scmroot/diffutils'...
$ git fetch origin oc9:KOJI_FETCH_HEAD
From https://gitee.com/src-opencloudos-rpms/diffutils
 * [new branch]      oc9        -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at d96086c import diffutils-3.10-2.tl4