Changelog for ghc-gi-gtk-devel-3.0.27-1.8.x86_64.rpm :

* Tue Jan 08 2019 psimonsAATTsuse.com- Update gi-gtk to version 3.0.27. Upstream has edited the change log file since the last release in a non-trivial way, i.e. they did more than just add a new entry at the top. You can review the file at: http://hackage.haskell.org/package/gi-gtk-3.0.27/src/ChangeLog.md
* Wed Dec 26 2018 psimonsAATTsuse.com- Add gi-gtk at version 3.0.26.