$ git clone -n https://src.fedoraproject.org/rpms/python-psycopg3.git /var/lib/mock/f40-build-803961-144396/root/chroot_tmpdir/scmroot/python-psycopg3
Cloning into '/var/lib/mock/f40-build-803961-144396/root/chroot_tmpdir/scmroot/python-psycopg3'...
$ git fetch origin 2711206e84eab51946acd064c44a9d18cb3202ba:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/python-psycopg3
 * [new ref]         2711206e84eab51946acd064c44a9d18cb3202ba -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 2711206 Add Cython version of psycopg and psycopg_pool as subpackages and Rebase to the latest upstream version (rhbz#2250316)