$ git clone -n https://gitee.com/src-opencloudos-rpms/libpq.git /var/lib/mock/dist-oc9-build-124393-73960/root/chroot_tmpdir/scmroot/libpq
Cloning into '/var/lib/mock/dist-oc9-build-124393-73960/root/chroot_tmpdir/scmroot/libpq'...
$ git fetch origin 2648ee9561844a773b371ff52fb1876e060d3473:KOJI_FETCH_HEAD
From https://gitee.com/src-opencloudos-rpms/libpq
 * [new ref]         2648ee9561844a773b371ff52fb1876e060d3473 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 2648ee9 import libpq-15.12-1.tl4