How to install Postgres 12 beta with YUM

I have installed the CentOS 7 PGDG file from https://yum.postgresql.org/repopackages.php

If I `cat /etc/yum.repos.d/pgdg-redhat-all.repo` I see:

# PGDG Red Hat Enterprise Linux / CentOS / Scientific Linux stable repositories:

[pgdg12]
name=PostgreSQL 12 $releasever - $basearch
baseurl=https://download.postgresql.org/pub/repos/yum/12/redhat/rhel-$releasever-$basearch
enabled=0
gpgcheck=1
gpgkey=file:///etc/pki/rpm-gpg/RPM-GPG-KEY-PGDG
...

But when I try to find the version to install I do not see it, e.g. `yum list postgresql* | grep 12` doesn't show anything with version 12.

Any ideas?

Thanks,