Analyse following RPM build log snippet. Describe contents accurately, without speculation or suggestions for resolution.            
Your analysis must be as concise as possible, while keeping relevant information intact.
Snippet: 
           {'baseurl': 'https://download.copr.fedorainfracloud.org/results/plautrba/selinux-fedora/fedora-$releasever-$basearch/',
            'id': 'https_download_copr_fedorainfracloud_org_results_plautrba_selinux_fedora_fedora_releasever_basearch',
            'name': 'Additional repo '
                    'https_download_copr_fedorainfracloud_org_results_plautrba_selinux_fedora_fedora_releasever_basearch'}],
This part of the task JSON tells you that there's an external (additional) repository used during package build. Copr consumes RPMs from multiple sources, and this one is non-standard.