title: how to get value from online helm repo
body: <p>I want to know some default value of helm chart.</p>
  
  <p>For example, I want to know .Values.master.tag of stable/jenkins.
  Is there a way to get this?</p>
  
  <p>For now,
  I think that I do <code>helm pull stable/jenkins</code> and then unzip tar and find out from values.yaml file.</p>
  
  <p>Thanks,</p>