title: Git commands in a batch file ran through VSTS throwing an error
body: <p>I have cloned remote GitHub repository into my Build Server.
  A build definition in VSTS generated a file as build artifact. I copy that file into local github repository in build server through a powershell script task in VSTS.
  I want to run Git commands to push this new build artifact file from local github repository to remote GitHub repository.
  I have stored batch file with Git commands on build server.
  When a build runs on VSTS, I try to invoke batch file residing in build server through a "Command Line Script" VSTS task.</p>
  
  <p>Command Line Script:</p>
  
  <pre><code>cd "batch file path"
  GitCommands.bat
  </code></pre>
  
  <p>Now I keep getting errors related to git commands in batch file. Below is an example. </p>
  
  <p><strong>Note: I am trying to push a single file directly to github repository using git commands in batch file.</strong></p>
  
  <pre><code>2018-08-30T20:17:07.9089221Z On branch master
  2018-08-30T20:17:07.9090417Z Your branch is up to date with 'origin/master'.
  2018-08-30T20:17:07.9166091Z 
  2018-08-30T20:17:07.9180427Z Untracked files:
  2018-08-30T20:17:07.9205244Z   (use "git add &lt;file&gt;..." to include in what will be committed)
  2018-08-30T20:17:07.9224271Z 
  2018-08-30T20:17:07.9298112Z    filename.ipa
  2018-08-30T20:17:07.9316134Z 
  2018-08-30T20:17:07.9457726Z nothing added to commit but untracked files present (use "git add" to track)
  2018-08-30T20:17:10.4572412Z fatal: Unable to write new index file
  2018-08-30T20:17:10.4614209Z file added
  2018-08-30T20:17:10.5106172Z On branch master
  2018-08-30T20:17:10.5107096Z Your branch is up to date with 'origin/master'.
  2018-08-30T20:17:10.5131465Z 
  2018-08-30T20:17:10.5145982Z Untracked files:
  2018-08-30T20:17:10.5184825Z    filename.ipa
  2018-08-30T20:17:10.5204032Z 
  2018-08-30T20:17:10.5280428Z nothing added to commit but untracked files present
  2018-08-30T20:17:38.9087093Z Terminate batch job (Y/N)? 
  </code></pre>
  
  <p>Batch file content:</p>
  
  <pre><code>*cd to github loval repository
  
  git status
  
  git add .
  
  echo file added
  
  git commit -m "Adding ipa file to the repository through VSTS automated build"
  
  git push origin master*
  </code></pre>