Hi,
I’ve noticed that the katello-client-repos-latest.rpm package (and other packages) appear to be missing from https://fedorapeople.org/groups/katello/releases/yum/3.8/client/f28/x86_64/
Also, the Katello 3.7 F28 client repo https://fedorapeople.org/groups/katello/releases/yum/3.7/client/f28/x86_64/ appears to be empty.