Given following log snippets, their explanation, and nothing else, explain what failure, if any, occurred during build of this package.

  Snippets are in a format of [X] : [Y], where [X] is a log snippet, and [Y] is the explanation.

  Snippets are delimited with '================'.

  Drawing on information from all snippets, provide a concise explanation of the issue and recommend a solution.

  Explanation of the issue, and recommended solution, should take a handful of sentences.

  Snippets:

  [ Librepo error: Cannot download toplink/packages/pcp/6.3.2/5.fc42/x86_64/pcp-pmda-dbping-6.3.2-5.fc42.x86_64.rpm: All mirrors were tried]: [Failed download of a package.]

Issue: DNF can not download a package.
Resolution: Check in Koji if the build contains the package which DNF failed to download. If the package is in the build, then restart the test as it was probably caused by a temporary glitch of a network.