This is a task for taskotron. It runs the rpmgrill tool on some downloaded packages and formats the results in YAML messages.
The rpmgrill tool contains a number of plugins that each analyze some different aspect of the built rpm. We perform one run of the tool, but report multiple results back to resultsdb, one for each plugin.
While it can be run standalone, it is designed to be executed by the libtaskotron. Please see the libtaskotron docs for details on execution.