title: Git commands failing HttpRequestException
body: <p>I am running Git version 2.12.1 on Windows Server 2012 R2 running against Microsoft Team Foundation Cloud Service.  No matter what Git command I run I keep getting this same error.  I have even opened my Firewall entirely to see if that was causing it but to no avail.  I have tried Clone, Push, &amp; Pull and they all return this error.  </p>
  
  <pre><code>git clone https://myaccount.visualstudio.com/_git/myProject
  Cloning into 'myProject'...
  fatal: HttpRequestException encountered.
     An error occurred while sending the request.
  
  Unhandled Exception: System.ObjectDisposedException: Cannot access a closed file.
     at System.IO.__Error.FileNotOpen()
     at System.IO.FileStream.Flush(Boolean flushToDisk)
     at System.IO.StreamWriter.Flush(Boolean flushStream, Boolean flushEncoder)
     at Microsoft.Alm.Git.Trace.Microsoft.Alm.Git.ITrace.Flush()
     at Microsoft.Alm.Cli.Program.Die(String message)
     at Microsoft.Alm.Cli.Program.Die(Exception exception)
     at Microsoft.Alm.Cli.Program.Main(String[] args)
  </code></pre>