EPEL 7 builds fail in Fedora Copr

INFO: Package manager yum detected and used (fallback)
INFO: Bootstrap image not marked ready
Start(bootstrap): installing yum tooling
Failed to set locale, defaulting to C
copr_base                                                | 1.8 kB     00:00     
https://download.copr.fedorainfracloud.org/results/%40copr/copr-dev/epel-7-x86_64/repodata/repomd.xml: [Errno 14] HTTPS Error 404 - Not Found
Trying other mirror.
To address this issue please refer to the below knowledge base article 

https://access.redhat.com/articles/1320623

If above article doesn't help to resolve this issue please open a ticket with Red Hat Support.

 One of the configured repositories failed ('Additional repo copr_copr_copr_dev'),
 and yum doesn't have enough cached data to continue. At this point the only
 safe thing yum can do is fail. There are a few ways to work "fix" this:

     1. Contact the upstream for the repository and get them to fix the problem.

     2. Reconfigure the baseurl/etc. for the repository, to point to a working
        upstream. This is most often useful if you are using a newer
        distribution release than is supported by the repository (and the
        packages for the previous distribution release still work).

     3. Run the command with the repository temporarily disabled
            yum --disablerepo=copr_copr_copr_dev ...

     4. Disable the repository permanently, so yum won't use it by default. Yum
        will then just ignore the repository until you permanently enable it
        again or use --enablerepo for temporary usage:

            yum-config-manager --disable copr_copr_copr_dev
        or
            subscription-manager repos --disable=copr_copr_copr_dev

     5. Configure the failing repository to be skipped, if it is unavailable.
        Note that yum will try to contact the repo. when it runs most commands,
        so will have to try and fail each time (and thus. yum will be be much
        slower). If it is a very temporary problem though, this is often a nice
        compromise:

            yum-config-manager --save --setopt=copr_copr_copr_dev.skip_if_unavailable=true

failure: repodata/repomd.xml from copr_copr_copr_dev: [Errno 256] No more mirrors to try.
https://download.copr.fedorainfracloud.org/results/@copr/copr-dev/epel-7-x86_64/repodata/repomd.xml: [Errno 14] HTTPS Error 404 - Not Found
WARNING: YUM command failed, retrying, attempt #2, sleeping 10s
Failed to set locale, defaulting to C
fedora-copr / copr

EPEL 7 builds fail in Fedora Copr #3478
