I see this output (example taken from the docs):
$ podman pull centos/postgresql-13-centos7
? Please select an image:
▸ registry.fedoraproject.org/centos/postgresql-13-centos7:latest
registry.access.redhat.com/centos/postgresql-13-centos7:latest
docker.io/centos/postgresql-13-centos7:latest
quay.io/centos/postgresql-13-centos7:latest
What variant should I pick?