https://github.com/genereese/togo-rpm
The project has a Quick-Start guide and I was able to create a basic RPM in less than 3 minutes.
1) Create the project directory using the script:
$ togo project create foobar; cd foobar
2) Make your desired directory structure under ./root and copy your files into it:
$ mkdir -p root/etc; cp /path/to/foobar.conf root/etc/
$ mkdir -p root/usr/bin; cp /path/to/foobar root/usr/bin/
3) Exclude system-owned directories from your RPM's ownership:
$ togo file exclude root/etc root/usr/bin
4) (OPTIONAL) Modify the generated spec to change your package description/dependencies/version/whatever, etc.:
$ vi spec/header
5) Build the RPM:
$ togo build package
-and your RPM is spit out into the ./rpms directory.