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:

  [Finish(bootstrap): chroot init]: [The 'Finish(bootstrap): chroot init' means that Mock finalized bootstrap installation, so there's no problem.]
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[Finish: installing minimal buildroot with dnf]: [The "Finish: installing minimal buildroot with dnf" means that even the minimal buildroot was successfully initialized.]
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[Start: build phase for rebase-helper-0.28.1-3.fc38.src.rpm]: [The "Start: build phase..." part means that Mock started building the source RPM. ]
=============
[Finish: build phase for rebase-helper-0.28.1-3.fc38.src.rpm]: [Source RPM has been successfully built.]
=============
[Error:
 Problem: package python3-sphinx_rtd_theme-1.1.1-2.fc38.noarch from copr_base requires (python3.11dist(sphinx) < 6~~ with python3.11dist(sphinx) >= 1.6), but none of the providers can be installed
  - cannot install both python3-sphinx-1:5.3.0-3.fc38.noarch from fedora and python3-sphinx-1:7.2.6-5.fc38.noarch from copr_base
  - cannot install the best candidate for the job]: [But `python3-sphinx_rtd_theme` from `copr_base` seems to require non-installable dependencies in buildroot.]

Issue: Because the BuildRequires specify a non-installable package.
Resolution: Fix the dependency tree, either python3-sphinx_rtd_theme or python3-sphinx or both.