stable builds are already available from the official fedora repositories
This repository contains daily snapshots of almost all elementary packages. If you want to look at the packaging-related files, they are in this github repo: https://github.com/decathorpe/elementary-nightly-rpms
This is a companion discussion topic for the original entry at https://copr.fedorainfracloud.org/coprs/decathorpe/elementary-nightly/