$ git clone -n https://gitee.com/opencloudos-stream/libdatachannel.git /var/lib/mock/dist-oc9-epol-build-82665-57128/root/chroot_tmpdir/scmroot/libdatachannel
Cloning into '/var/lib/mock/dist-oc9-epol-build-82665-57128/root/chroot_tmpdir/scmroot/libdatachannel'...
$ git fetch origin master:KOJI_FETCH_HEAD
From https://gitee.com/opencloudos-stream/libdatachannel
 * [new branch]      master     -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 43d7bf8 package init