Initial code

src/Handler.php

@@ -88,7 +88,7 @@ class Handler {
    */
   protected function prepareWorkingDirectory($path, $project, $version, $username) {
     list(, $projectname) = explode('/', $project);
-    $repo = $username . '@git.drupal.org/project/' . $projectname . '.git';
+    $repo = $username . '@git.drupal.org:project/' . $projectname . '.git';
 
     // Git Clone the repository into the working directory
     $repository = Repository::open($path);