title: What is "git pack-redundant -all" actually doing?
body: <p>The documentation of <code>pack-redundant</code> has no information which pack is actually meant as redundant. And also it recommended to delete only packs containing unreachable objects.</p>
  
  <p>Can I remove all redundant packs from repository, is it safe? Where is no any information actually. Our repositories are about 300GB on disk, and redundant packs are about 150GB. So, that's why I ask this question. If I  remove some required packs, it will be not very good.</p>