The good news is that we finally have the required graphics library for CentOS 8 (perl-Gtk3).
The bad news is that to install the rpm, you will need to enable other CentOS 8 repositories.
For perl-Locale-gettext, you must enable CentOS-PowerTools.repo. If you're still getting dependency errors, it means the perl-Gtk3 rpm has not been pushed into stable. If you're in a hurry, enable the epel-testing.repo repo. Otherwise, it will be pushed sooner or later.
Also, please let me know if there are any issues with the builds. I have not had much time to experiment with CentOS 8 yet.
And, for CentOS 8 builds, as of 20200222, I can't find the nautilus-python rpm, so I can't test or release 0.05 for clamtk-gnome.