I thought this was neat. Apparently RPM uses an rc file that contains macro definitions which are generic and distribution specific. Fedora 34 and Rocky's RPM rc vary wildly. I wonder if this effects how RPM packages are built on the different distributions.
https://access.redhat.com/documentation/en-us/red_hat_enterprise_linux/8/html/packaging_and_distributing_software/advanced-topics#rpm-distribution-macros_more-on-macros