Where/How to report stale mirror content?

[mason]

Hello,

Where should I report issues with stale mirror content? I'm seeing issues with stale content from mirrors that are listed as being up to date at https://mirror-status.centos.org/

For example the repomd.xml file at http://mirror.it.ubc.ca/centos/7/update ... /repodata/ has not been updated since June 25, but the current file on other mirrors was updated July 16. This is not the only mirror with this problem.

Thanks