title: What are the "loose objects" that the Git GUI refers to?
body: <p>When I open the <strong>Git GUI</strong>, I get a popup message that refers to <code>loose objects</code>. I did <code>git gc</code> and that removed the message.</p>
  
  <p>What are <code>loose objects</code> and how could I prevent this from occurring again?</p>