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 'baseos':
  - Downloading successful, but checksum doesn't match. Calculated: 5a908a5f236b0daddc5e84454e1b87fa0cb5187b90b1658240810aeb367ff433b6a9984d578435653352439ebf8688d1887cc36c391b06f789010d89039b39af(sha512)  Expected: 8dcee90bfb687014b9f04b1207fb7936d38ba262ef2f3a5968d64693f0ef190b5f65ef4da2d605b7d5c6d9a97d70ce598b980538e514f9dcd20ea356a9aa8c18(sha512) 
Error: Failed to download metadata for repo 'baseos': Cannot download repomd.xml: Cannot download repodata/repomd.xml: All mirrors were tried
The 'baseos' repository metadata were successfully downloaded but checksum verification has failed.