$ git clone -n https://gitee.com/src-opencloudos-rpms/greenboot.git /var/lib/mock/dist-oc9-build-127485-76789/root/chroot_tmpdir/scmroot/greenboot
Cloning into '/var/lib/mock/dist-oc9-build-127485-76789/root/chroot_tmpdir/scmroot/greenboot'...
$ git fetch origin oc9:KOJI_FETCH_HEAD
From https://gitee.com/src-opencloudos-rpms/greenboot
 * [new branch]      oc9        -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 24240d8 import greenboot-0.15.4-4.tl4