COPR: managing external repository requirements

For setting up a COPR repo to build across multiple distributions (Fedora/EL), I have repositories (EPEL, powertools) that are required for EL but not Fedora.
Is there a way to adjust the settings such that the end-user isn’t prompted to add unnecessary repos (EPEL and powertools) when installing on Fedora (for example)?

Asked another way, can I write conditionals into external repository requirements in the COPR repo settings?

Maybe you could refer to this documentation: here.