Josh Boyer of the Fedora Project has setup the Fedora Kernel Playground as a Copr repository to use if you wish to try out bleeding-edge Linux kernel features. This kernel isn't officially supported, bug reports will be largely ignored, and this kernel isn't recommended for production machines. However, for those wishing to try out kernel features not even found in Fedora Rawhide, this is a great repository without having to patch and spin your own kernel.
Among the features offered right now for the Fedora Kernel Playground are KDBUS and OverlayFS v22.
Those interested in more information or to try out the experimental kernel repository for Fedora can view the Copr repository and Boyer's blog post.