Hi,
I've updated samba package in @freeipa/freeipa-master to include patches that allow FreeIPA to use Python3 for trust to AD feature. These patches will be part of Samba 4.7.0-RC2 to be released next week.
You can test it with my PR#918: https://github.com/freeipa/freeipa/pull/918
The same build is going to appear in Rawhide when s390x builders start working again. Fedora Infra people are looking into the issues which seem to be related to glibc.