Comment 3 for bug 1730931

From Wes: tripleo CI role rebuilding RPMs from distgit is
https://github.com/openstack/tripleo-quickstart-extras/tree/master/roles/install-built-repo

My initial brain dump:
That's where dlrn call could be replaced by taking SRPM from trunk.rdo mirror-cache in infra and unpacking (not just spec, it'd be rpmbuild -rp <package.src.rpm>) then replacing tarball in SOURCES and rebuilding in mock. Last two steps could be part of dlrn tool, TBD.