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: 

Errors during downloading metadata for repository 'http_kojipkgs_fedoraproject_org_repos_rawhide_latest_basearch':
  - Status code: 404 for https://kojipkgs.fedoraproject.org/repos/rawhide/latest/s390x/repodata/7ea5d60a860c857599e3ea6a936272eae2e76e7e0ef6a3d71948120ebc2c93da-primary.xml.gz (IP: 38.145.60.21)
Error: Failed to download metadata for repo 'http_kojipkgs_fedoraproject_org_repos_rawhide_latest_basearch': Yum repo downloading error: Downloading error(s): repodata/7ea5d60a860c857599e3ea6a936272eae2e76e7e0ef6a3d71948120ebc2c93da-primary.xml.gz - Cannot download, all mirrors were already tried without succes
And here we see that the Koji buildroot repository had some (perhaps temporary) problems when the builder machine attempted to download metadata files.

This actually shouldn't happen.  See https://pagure.io/releng/issue/11870 for more info.