$ git clone -n https://src.fedoraproject.org/rpms/postgresql-jdbc.git /var/lib/mock/f45-build-53701-928/root/chroot_tmpdir/scmroot/postgresql-jdbc
Cloning into '/var/lib/mock/f45-build-53701-928/root/chroot_tmpdir/scmroot/postgresql-jdbc'...
$ git fetch origin 9f00f00522a930648e4403514de385d2ac778469:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/postgresql-jdbc
 * [new ref]         9f00f00522a930648e4403514de385d2ac778469 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 9f00f00 Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild