$ git clone -n https://gitee.com/src-opencloudos-rpms/hostname.git /var/lib/mock/dist-oc9-build-70048-47380/root/chroot_tmpdir/scmroot/hostname
Cloning into '/var/lib/mock/dist-oc9-build-70048-47380/root/chroot_tmpdir/scmroot/hostname'...
$ git fetch origin oc9:KOJI_FETCH_HEAD
From https://gitee.com/src-opencloudos-rpms/hostname
 * [new branch]      oc9        -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 4b428f3 import hostname-3.23-4.tl4