$ git clone -n https://src.fedoraproject.org/rpms/python-psycopg3.git /var/lib/mock/f40-build-1537121-23930/root/chroot_tmpdir/scmroot/python-psycopg3
Cloning into '/var/lib/mock/f40-build-1537121-23930/root/chroot_tmpdir/scmroot/python-psycopg3'...
$ git fetch origin bcb75373f97b50e41f3040d01c2dd08dcc3bde62:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/python-psycopg3
 * [new ref]         bcb75373f97b50e41f3040d01c2dd08dcc3bde62 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at bcb7537 Confirm libpq require for (rhbz#2266555) and Fix architectures for specific subpackages (rhbz#2268354)