Scl yum repo CA untrusted in Rackspace?

Recently we started seeing this issue in our bats tests:

Loaded plugins: fastestmirror, langpacks

# [Errno 14] curl#60 - "Peer's certificate issuer has been marked as not trusted by the user."

Trying other mirror.

··· # # # One of the configured repositories failed (Ruby193 - epel-7-x86_64), # and yum doesn't have enough cached data to continue. At this point the only # safe thing yum can do is fail. There are a few ways to work "fix" this:

It appears that rackspace systems do not trust whatever CA is used for
the webserver hosting the SCL? Has anyone seen anything similar?