$ git clone -n https://gitee.com/opencloudos-stream/svt-vp9.git /var/lib/mock/dist-oc9-epol-build-80480-53695/root/chroot_tmpdir/scmroot/svt-vp9
Cloning into '/var/lib/mock/dist-oc9-epol-build-80480-53695/root/chroot_tmpdir/scmroot/svt-vp9'...
$ git fetch origin master:KOJI_FETCH_HEAD
From https://gitee.com/opencloudos-stream/svt-vp9
 * [new branch]      master     -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at c1ff600 package init