$ git clone -n https://gitee.com/opencloudos-stream/vapoursynth.git /var/lib/mock/dist-oc9-epol-build-78818-53114/root/chroot_tmpdir/scmroot/vapoursynth
Cloning into '/var/lib/mock/dist-oc9-epol-build-78818-53114/root/chroot_tmpdir/scmroot/vapoursynth'...
$ git fetch origin master:KOJI_FETCH_HEAD
From https://gitee.com/opencloudos-stream/vapoursynth
 * [new branch]      master     -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at bb0b8c1 package init