$ dnf repoquery --repo=koji-ruby30 --qf '%{sourcerpm}' --whatrequires "libruby.so.2.7()(64bit)" | cat -n ... 3 rubygem-mysql2-0.5.3-5.fc33.src.rpm
I am working on the rubygem-mysql2 package to build on rawhide. See https://bugzilla.redhat.com/show_bug.cgi?id=1914515 for detail.