2) webkitgtk -
https://copr.fedorainfracloud.org/coprs/vondruch/ruby-3.2/build/5132009/
Obviously, the issue is with independent rubygem-json, which was not build by
mass-prebuild. This is probably tricky due to rubygem-json being subpackage of ruby while
there is also independent RPM.
Just note that webkitgtk-2.39.2-6.fc38 is known to FTBFS with ruby3.2,
-7.fc38 is needed (currently still building), see: