pgdg packages for 9.2, 9.4+ can be located at
https://yum.postgresql.org/9.x/redhat/rhel-6-x86_64/ where x is the minor
version for all but 9.3.
i.e.
https://yum.postgresql.org/9.2/redhat/rhel-6-x86_64/pgdg-centos92-9.2-3.noarch.rpm
exists
but not
https://yum.postgresql.org/9.3/redhat/rhel-6-x86_64/pgdg-*.noarch.rpm
There been a problem with the automated builds since April 17 for 9.3
Not sure if there is a better forum for this?
Cheers,
Lew