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:

  [Error: Invalid value for '[PATH_OR_URL]': Cmd('git') failed due to: exit code(128)
  cmdline: git fetch -v -- origin +refs/pull/37301/head:refs/remotes/origin/pr-changes/37301
  stderr: 'fatal: couldn't find remote ref refs/pull/37301/head']: [This seems like Packit wasn't able to clone PR HEAD]
=============
[Try 'packit prepare-sources -h' for help.]: [Packit performed a build]

Issue: Build failed because Packit wasn't able to download Sources from PR HEAD
Resolution: Try to rerun Packit in PR by force-pushing PR or by commenting on PR with /packit rebuild-failed