title: Finding the commit date time of a particular tag
body: <p>I am using github api to get all the details from github. I want to get the commit date time of a particular tag of my repo. </p>
  
  <p>For example: To get the tags of this repo used as example I do:</p>
  
  <pre><code>https://api.github.com/repos/fastly/epoch/tags
  </code></pre>
  
  <p>which returns me list of all the tags. Suppose I want to find the commit date time of tag named "0.3.4". 
  One way to do this is iterate over each tag in the array of tags and get the commit url of "0.3.4." i.e. </p>
  
  <pre><code>https://api.github.com/repos/fastly/epoch/commits/1560ef3cca58b71a9481ede2819d46d3a7a6ce51
  </code></pre>
  
  <p>which has the details of the commit date time. </p>
  
  <p>But is there a way to directly get the details of the commit date time of the tag? I tried the following:</p>
  
  <pre><code>https://api.github.com/repos/fastly/epoch/tags?ref=0.3.4
  https://api.github.com/repos/fastly/epoch/tags?path=0.3.4
  https://api.github.com/repos/fastly/epoch/tags?name=0.3.4
  </code></pre>
  
  <p>All these links, returns me a list of all the tags same as what I get when I do - <code>https://api.github.com/repos/fastly/epoch/tags?ref=0.3.4</code></p>