$ git clone -n https://gitee.com/opencloudos-stream/freight.git /var/lib/mock/dist-oc9-epol-build-90861-59124/root/chroot_tmpdir/scmroot/freight
Cloning into '/var/lib/mock/dist-oc9-epol-build-90861-59124/root/chroot_tmpdir/scmroot/freight'...
$ git fetch origin master:KOJI_FETCH_HEAD
From https://gitee.com/opencloudos-stream/freight
 * [new branch]      master     -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 41097a2 package init