$ git clone -n https://gitee.com/src-opencloudos-rpms/postgresql-jdbc.git /var/lib/mock/dist-oc9-build-121327-71626/root/chroot_tmpdir/scmroot/postgresql-jdbc
Cloning into '/var/lib/mock/dist-oc9-build-121327-71626/root/chroot_tmpdir/scmroot/postgresql-jdbc'...
$ git fetch origin oc9:KOJI_FETCH_HEAD
From https://gitee.com/src-opencloudos-rpms/postgresql-jdbc
 * [new branch]      oc9        -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 830771f import postgresql-jdbc-42.5.6-3.tl4