The latest released version of elfutils always appears in Fedora development builds and can be found in http://koji.fedoraproject.org/packages/elfutils/.
Most versions are also released as Fedora updates for the current and one or two prior versions of Fedora.
The source for elfutils is available in http://fedorahosted.org/releases/e/l/elfutils/.
See https://fedorahosted.org/mailman/listinfo/elfutils-devel for the developers' mailing list.
Source code repository
You can track the sources using GIT with:
git clone git://git.fedorahosted.org/git/elfutils.git
See the development RoadMap