From Fedora Project Wiki
Scripts that wrap fedpkg
fedpkg interacts with only one package, whereas the reality is many maintainers work with multiple RPMs, often with inter-build dependencies, from potentially multiple source code locations.
This page is attempting to gather together lists of scripts and tools which edit spec files programmatically and are layered on top of fedpkg/koji.
anaconda/scripts/makebumpver
https://git.fedorahosted.org/cgit/anaconda.git/tree/scripts/makebumpver
Interacts with upstream git + Bugzilla, generates spec file data.
mclazy
Syncs from GNOME ftp via tarballs. Builds many packages. Also has code for interacting with COPR.
tito
Probably the most advanced layered tool.