The check that generates this alert:
PROBLEM - koji01.phx2.fedoraproject.org/koji is CRITICAL: HTTP CRITICAL: HTTP/1.1 200 OK - string x86-10 not found on http://koji.fedoraproject.org:80/koji/hosts - 14645 bytes in 0.145 second response time (noc01)

should be changed. It's looking at the koji web page, but specifically looking for x86-10, which could be disabled at any time and not cause problems.

Either just check that the page loads ok, or perhaps we could check and confirm that there is at least one ppc host and one x86 host enabled.