title: homebrew - force install even with SHA1 mismatch
body: <p>I'm installing something through homebrew but one of it's dependencies is failing to install, saying that the downloaded artifact has a different SHA1 checksum than what homebrew expects. The culprit is <code>suite-sparse</code> v4.2.1 and from checking the homebrew issue tracker, it seems the owner of this package has a tendency to make changes without bumping versions.</p>
  
  <p>I have a ticket in with the homebrew experts to double check this package and vet the new SHA1. In the meantime..</p>
  
  <p><strong>Is it possible to force homebrew to install a package even if the SHA1 is incorrect?</strong></p>
  
  <p>I don't mind doing a little manual installing, so long as the package remains homebrew friendly and a future <code>brew update</code> will update to the latest version without issues.</p>