$ git clone -n https://gitee.com/src-opencloudos-rpms/subunit.git /var/lib/mock/dist-oc9-build-60551-16463/root/chroot_tmpdir/scmroot/subunit
Cloning into '/var/lib/mock/dist-oc9-build-60551-16463/root/chroot_tmpdir/scmroot/subunit'...
$ git fetch origin oc9:KOJI_FETCH_HEAD
From https://gitee.com/src-opencloudos-rpms/subunit
 * [new branch]      oc9        -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at df785eb import subunit-1.4.2-6.tl4