We recently received this request from the Automotive SIG to enable fedora-messaging notification on the cbs.centos.org koji instance. (see https://pagure.io/centos-infra/issue/650)
After some tests in dev/stg environment (thanks Pingou !), we pushed live the change earlier today and that means that if you're already using fedora-messaging, you'll be able to track activities from cbs.centos.org on fedora-messaging, or through datagrepper.
For example, you'll be able to use https://apps.fedoraproject.org/datagrepper/v2/search?category=cbs to see recent activity on cbs.centos.org
More information about fedora-messaging on https://fedora-messaging.readthedocs.io/ and https://apps.fedoraproject.org/datagrepper/