Exclude or change package used as dependency in rpm package under CentOS

I have an RPM package that depends on many other packages, so installing it will install everything I need - quite a normal approach. But one of the packages depends on custom nginx build (general nginx + some extra modules) from 3rd-part repo, which is not supported anymore. The bad part of it is that maintainer named that custom nginx package with some 'custom' name, not just 'nginx' but 'my-nginx').

As I do not use any of the nginx modules I'd better to use nginx.org's nginx package, but of course I can not install 'nginx' as it conflicts with 'my-nginx'. I can only do that by 'force' install.

Is there any way for me to have nginx as 'my-nginx' so dependency won't be break and system can be updated without complaining on broken packages?

Thank you!