title: Find files in git repo over x megabytes, that don't exist in HEAD
body: <p>I have a Git repository I store random things in. Mostly random scripts, text files, websites I've designed and so on.</p>
  
  <p>There are some large binary files I have deleted over time (generally 1-5MB), which are sitting around increasing the size of the repository, which I don't need in the revision history.</p>
  
  <p>Basically I want to be able to do..</p>
  
  <pre><code>me@host:~$ [magic command or script]
  aad29819a908cc1c05c3b1102862746ba29bafc0 : example/blah.psd : 3.8MB : 130 days old
  6e73ca29c379b71b4ff8c6b6a5df9c7f0f1f5627 : another/big.file : 1.12MB : 214 days old
  </code></pre>
  
  <p>..then be able to go though each result, checking if it's no longer required then removing it (probably using <code>filter-branch</code>)</p>