Buildroot tags?

Hi, how do buildroot tags work on rpmfusion? The new rtmpdump packages have been built on F-20 and rawhide, and the following packages need to be rebuilt against the new version: ffmpeg-compat-0.6.7-3.fc20.src.rpm gstreamer-plugins-bad-0.10.23-4.fc20.src.rpm gstreamer1-plugins-bad-freeworld-1.2.1-1.fc20.src.rpm lightspark-0.7.2-5.20130827git.fc20.src.rpm mplayer-1.1-16.20131125svn.fc20.src.rpm -- Susi Lehtola Fedora Project Contributor jussilehtola(a)fedoraproject.org