$ git clone -n https://gitee.com/src-opencloudos-rpms/libpq.git /var/lib/mock/dist-oc9-build-121007-71522/root/chroot_tmpdir/scmroot/libpq
Cloning into '/var/lib/mock/dist-oc9-build-121007-71522/root/chroot_tmpdir/scmroot/libpq'...
$ git fetch origin oc9:KOJI_FETCH_HEAD
From https://gitee.com/src-opencloudos-rpms/libpq
 * [new branch]      oc9        -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at bb5fc28 import libpq-15.3-6.tl4