title: get the log author in jenkins build
body: <p>I have Jenkins with the git plugin.  I want to the a author that appears in the git log for a particular commit in the MANIFEST.MF file.  I have the maven-jar-plugin to do this, and I also send in the build number and hash.  </p>
  
  <p>The Jenkins build command looks like this:</p>
  
  <pre><code>clean install -DskipTests -Dbuild.number=${BUILD_NUMBER} -Dbuild.revision=${GIT_COMMIT} -Dbuild.author=${GIT_AUTHOR_NAME}
  </code></pre>
  
  <p>Now the BUILD_NUMBER and GIT_COMMIT are working just fine,  but the author name is NULL.</p>
  
  <p>I set a behavior to use commit author in changelog,  but that did not work.  Any other ideas? </p>