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:

  [/usr/bin/tar: This does not look like a tar archive
gzip: stdin: not in gzip format
/usr/bin/tar: Child returned status 1
/usr/bin/tar: Error is not recoverable: exiting now]: [Error message]
=============
[3.1.tar.gz]: [Suspicious name of tarball]

Issue: Source tarball could not be uncompressed.
Resolution: From the error and name of tarball it seems that there is an error in `Source:` in the SPEC file, check that the url contains full name of the tarball.