Description of problem:
  If copr repo does not have builds - .repo file does not exists which is correctly described on web page:
    "Repository not initialized: No finished builds in blaskovic/bde."

  If you would like to enable this repo via dnf copr enable, it throws error:
    Error: [Errno 14] HTTPS Error 404 - Not Found

This could be confusing


Version-Release number of selected component (if applicable):
dnf-plugins-core-0.1.0-2.fc20.noarch
dnf-0.5.2-1.fc20.noarch

Steps to Reproduce:
1. dnf search something
    You get results, so the copr-project exists!
2. dnf enable something

Actual results:
Do you want to continue? [y/N]: y
Error: [Errno 14] HTTPS Error 404 - Not Found

Expected results:
Do you want to continue? [y/N]: y
This repository does not have builds yet so you cannot enable this repository.