$ git clone -n https://gitee.com/src-opencloudos-rpms/velocity.git /var/lib/mock/dist-oc9-build-72212-47661/root/chroot_tmpdir/scmroot/velocity
Cloning into '/var/lib/mock/dist-oc9-build-72212-47661/root/chroot_tmpdir/scmroot/velocity'...
$ git fetch origin oc9:KOJI_FETCH_HEAD
From https://gitee.com/src-opencloudos-rpms/velocity
 * [new branch]      oc9        -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at e388eb3 import velocity-1.7-6.tl4