$ git clone -n https://gitee.com/opencloudos-stream/knot.git /var/lib/mock/dist-oc9-epol-build-231352-81584/root/chroot_tmpdir/scmroot/knot
Cloning into '/var/lib/mock/dist-oc9-epol-build-231352-81584/root/chroot_tmpdir/scmroot/knot'...
$ git fetch origin master:KOJI_FETCH_HEAD
From https://gitee.com/opencloudos-stream/knot
 * [new branch]      master     -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 0fdb6fa !4 Update to 3.4.8-1 Merge pull request !4 from brucezhang/master