$ git clone -n https://src.fedoraproject.org/rpms/postgresql-jdbc.git /var/lib/mock/f40-build-2496087-61664/root/chroot_tmpdir/scmroot/postgresql-jdbc
Cloning into '/var/lib/mock/f40-build-2496087-61664/root/chroot_tmpdir/scmroot/postgresql-jdbc'...
$ git fetch origin c3c8df3275e5cc2297c996a0ef51180517c880b8:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/postgresql-jdbc
 * [new ref]         c3c8df3275e5cc2297c996a0ef51180517c880b8 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at c3c8df3 Rebuilt for java-21-openjdk as system jdk