Godot 3.0.2 (Mono Version)
Godot requires Mono 5.4.x but the Fedora repo is still stuck on an older version. Install the latest directly from the Mono Project (currently 5.10.x).
http://www.mono-project.com/download/stable/#download-lin
rpm --import "http://keyserver.ubuntu.com/pks/lookup?op=get&search=0x3FA7E0328081BFF6A14DA29AA6A19B38D3D831EF"