$ git clone -n https://gitee.com/opencloudos-stream/openstack-nova.git /var/lib/mock/dist-oc9-epol-build-68600-47008/root/chroot_tmpdir/scmroot/openstack-nova
Cloning into '/var/lib/mock/dist-oc9-epol-build-68600-47008/root/chroot_tmpdir/scmroot/openstack-nova'...
$ git fetch origin master:KOJI_FETCH_HEAD
From https://gitee.com/opencloudos-stream/openstack-nova
 * [new branch]      master     -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 8302a36 !4 deprecate python3-dataclasses replacing with python built-in. Merge pull request !4 from cunshunxia/master