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:

  [  !! Copr timeout => sending I]: [This is a sign that Copr build system terminated the build process using SIGINT because the time was out.]
=============
[
Executing(%check): /bin/sh -e /var/tmp/rpm-tmp.Cneu]: [Since `%check` is the last spec section mentioned before the actual failure, it is clear that it is a failure in tests (not %build or %install).]

Issue: The build of copr-backend package typically finishes relatively quickly, within 10 minutes. The default Fedora Copr timeout, in the year 2024, is by default 5 hours.  Because it timeouted, it seems that the build simply hung.  In this case during the test-suite execution.
Resolution: Fix the test-suite. It probably found a real problem in the package, and it is *very* good it was found at package build-time.