This is not an important thing but DNF needs it for full Yum compatibility, so please consider adding this at some point. There is no way to obtain the list of all mirrors from a repo obtained via a metalink. This should be possible with both remote and local repositories, in case e.g. the DNF user wants to see where exactly were the metadata downloaded from. Yum stores the metalink file with the downloaded repo for this purpose.
I've add support for store mirrorlist/metalink with downloaded metadata: https://github.com/Tojaj/librepo/commit/98464477201bdeda18df72cd4a5459b0fe9681ec New option LRI_MIRRORS was added: https://github.com/Tojaj/librepo/commit/056a1152447b42ed03d13e320c21fb0bde7bee0f
librepo-0.0.2-3.20130408git720d68d.fc19 has been submitted as an update for Fedora 19. https://admin.fedoraproject.org/updates/librepo-0.0.2-3.20130408git720d68d.fc19
librepo-0.0.2-3.20130408git720d68d.fc19 has been pushed to the Fedora 19 stable repository. If problems still persist, please make note of it in this bug report.