We would like to announce that OKD v3.11 rpms been officially released and are available at http://mirror.centos.org/centos/7/paas/x86_64/openshift-origin311/. 
In order to use the released repo  we have created and published the rpm (contains the yum configuration file)  which is in the main CentOS extra repository. The rpm itself has a dependency on the centos-release-ansible26  which is the ansbile 2.6 version rpm built by CentOS Infra team.
Should you decide not to use the centos-release-openshift-origin3* rpm then will be your responsibility to get ansible 2.6 required to by openshift-ansible installer.
Please note that due to ongoing work on releasing CentOS 7.6, the mirror.centos.org repo is in freeze mode - see https://lists.centos.org/pipermail/centos-devel/2018-November/017033.html  and as such we have not published the rpms to http://mirror.centos.org/centos/7/paas/x86_64/openshift-origin/ . Once the freeze mode will end, we'll publish the rpms.
Kudos goes to CentOS Infra team for being very kind in giving us a waiver to make the current release possible.
PaaS SIG team