title: What is the usage of Maven pom.xml - <tag> element inside of <scm> when you are using git
body: <p>We are using maven and git together for a Java project.  In <code>&lt;scm&gt;</code> section, <code>&lt;tag&gt;</code> is automatically added by release plugin.</p>
  
  <p>For example,</p>
  
  <pre><code>  &lt;scm&gt;
            &lt;connection&gt;scm:git:http://myserver:7990/scm/project/test.git&lt;/connection&gt;
            &lt;tag&gt;releaes-tag&lt;/tag&gt;
    &lt;/scm&gt;
  </code></pre>
  
  <p>What does <code>&lt;tag&gt;</code> represent here?</p>
  
  <p>I believe the normal convention is <code>&lt;tag&gt;HEAD&lt;/tag&gt;.</code></p>
  
  <p>When we were using subversion, maven never used <code>&lt;tag&gt;&lt;/tag&gt;</code></p>
  
  <p>What is the meaning of <code>&lt;tag&gt;&lt;/tag&gt;</code>?</p>
  
  <p>I searched google and maven documentation but I cannot find any information on it.</p>