I'm currently testing this in a fresh Fedora 26 VM (going to install it as my main 4th OS if all goes well) and the script is failing to build the RPM.
Converting DEB to RPM...
Conversion Failed!
I assume this is related to rpmbuild not being automatically installed for whatever reason(s) even though it *should*. Doing
sudo dnf install rpm-build manually fixes that issue though, but so far it's still failing to build. Still looking into it, will post workaround if I find one.
EDIT: Huh, after a few reboots it just started working on its own after installing google-chrome-stable. No clue why though as both rpmbuild and dpkg were both installed, oh well. I also made a fork of the script which installs the latest beta versions, which works good.
EDIT 2: Looks like rpmbuild got renamed to rpm-build. That'll explain it.