title: sbt-release not able to git push
body: <p>I'm trying to build a sbt project with jenkins. I'm getting the following error when doing a sbt clean "release with-defaults" :</p>
  
  <pre><code>[info] Starting release process off commit: ce6dcb5a1fdbf5330766e47f3adb26ebc5082c8d
  java.lang.RuntimeException: No tracking branch is set up. Either configure a remote tracking branch, or remove the pushChanges release part.
  </code></pre>
  
  <p>The remote branches seem to be set fine. Following is the output of some of the git commands:</p>
  
  <pre><code>git --version
  git version 1.8.3.1
  
  git branch -r
  * master ce6dcb5 debug jenkins
    origin/master
  
  git branch -av
  * master                ce6dcb5 debug jenkins
    remotes/origin/master ce6dcb5 debug jenkins
  
  git remote show origin
  * remote origin
    Fetch URL: ssh://git@stash:7999/~analya/docker-test.git
    Push  URL: ssh://git@stash:7999/~analya/docker-test.git
    HEAD branch: master
    Local ref configured for 'git push':
      master pushes to master (up to date)
  </code></pre>
  
  <p>Am I missing something?</p>