The current Mir release, 0.28.1, is in the Fedora 26, 27 and rawhide archives.
To install and run the Mir demos on Fedora:
$ sudo dnf install mir-demos qterminal $ miral-desktop
You can find some things to try here: Getting and Using Mir
Note: We use qterminal with the demos as the Qt Wayland backend can work with Mir’s current Wayland support.