RPM error: following noarch package built differently on different architectures

[Germano Massullo]

Good day everybody. As some from #fedora-golang channel may know, Fabian
Affolter and I, we are releasing for the first time Bettercap to Fedora
repository. By the way we are getting this build error and we have no
idea about how to fix it
FAILED: BuildError: The following noarch package built differently on
different architectures:
golang-github-bettercap-devel-2.28-4.fc34.noarch.rpm
Since the problem seemed to be s390x architecture, we tried using
"ExcludeArch: s390x" but it did not work.
What should we do? If you want, feel free to use your proven packager
super powers to fix it
Thank you for your time