$ git clone -n https://gitee.com/src-opencloudos-rpms/paper.git /var/lib/mock/dist-oc9-build-71007-47502/root/chroot_tmpdir/scmroot/paper
Cloning into '/var/lib/mock/dist-oc9-build-71007-47502/root/chroot_tmpdir/scmroot/paper'...
$ git fetch origin oc9:KOJI_FETCH_HEAD
From https://gitee.com/src-opencloudos-rpms/paper
 * [new branch]      oc9        -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 778af01 import paper-2.3-4.tl4