Changelog for tk-devel-8.6.8-2.fc31.x86_64.rpm :

* Tue Jan 14 2020 Jaroslav Škarvada - 1:8.6.8-2- Fixed font sizes Resolves: rhbz#1244729
* Mon Mar 19 2018 Jaroslav Škarvada - 1:8.6.8-1- New version
* Sun Feb 25 2018 Florian Weimer - 1:8.6.7-3- Late arrival for mass rebuild for Fedora 28