Hi,
As announced (https://lists.centos.org/pipermail/centos-announce/2018-December/023082.html) , CentOS 7.6.1810 is now available and realeased for the following arches : x86_64, aarch64, ppc64le, armhfp So that release is now the default one for the CBS/koji build tasks (and all koji regen-repos tasks are currently running)
That means that for your next builds, you'll be building against 7.6.1810 (even if technically that was already the case with the 7.5.1804+updates+CR repositories)
That should also mean the end of the "freeze" wrt pushing tagged pkgs for release to mirror.centos.org