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: 

 rpm-build                   x86_64 4.18.91-3.fc38              copr_base  69
Note that `rpm-build` is installed from `copr_base` directory, not from Fedora default repositories.  It means that the `rp-build` package is "overwritten" by the Copr repository, and is non-default.  The fact that the Copr author overwrites this low-level utility looks suspicious and is likely guilty for the transaction failure.