$ git clone -n https://gitee.com/src-opencloudos-rpms/python-blockdiag.git /var/lib/mock/dist-oc9-epol-build-55757-14784/root/chroot_tmpdir/scmroot/python-blockdiag
Cloning into '/var/lib/mock/dist-oc9-epol-build-55757-14784/root/chroot_tmpdir/scmroot/python-blockdiag'...
$ git fetch origin oc9:KOJI_FETCH_HEAD
From https://gitee.com/src-opencloudos-rpms/python-blockdiag
 * [new branch]      oc9        -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 23b31a4 import python-blockdiag-3.0.0-2.tl4