We can just parse the release out of the 'build' value, here.
All tests still run properly because we use the * wildcard
in the job groups and so on. Passing a proper 'version' value
prevents T581: when you schedule jobs from an ISO, openQA
will obsolete any running or scheduled jobs with the same
DISTRI, FLAVOR, VERSION and ARCH.

Schedule jobs for two composes at the same time
(e.g. Branched and Rawhide), see that the second set does
not obsolete the first. Make sure setting VERSION has no
unexpected consequences.