Hi, I created a copr for the development versions (lyx-2.3 for now): https://copr.fedorainfracloud.org/coprs/jamatos/lyx-devel/
This is more or less the equivalent of ppa for the debian/ubuntu world. These packages have the suffix -devel, the fedora package is called lyx- devel as well and it can be installed parallel to the stable lyx package. The packages can work side by side because the user directory is called ~/.lyx- devel. I am currently building the package for Fedora 24 and EPEL 7 (x86_64) and for Fedora 25, 26 and rawhide (i386, ppc64le, x86_64). Since this is a development version I have one change (patch) that is not in the alpha1-1 package, this package uses forcefully python 3 (I am still working on EPEL 7 regarding this). The purpose is obvious. :-) I have identified a potential problem, there is no way to change the python binary used if binary is called python and is in the path. For Fedora and other distributions, /usr/bin/python still points to python2 even if python3 is present. I will comment in other threads tomorrow. -- José Abílio