diff --git a/kas/config.py b/kas/config.py
index b8b3cd3..2ffa8b0 100644
--- a/kas/config.py
+++ b/kas/config.py
@@ -49,7 +49,7 @@ except ImportError:
         return platform.dist()[0]
 
 from .repos import Repo
-from .libkas import run_cmd, repos_fetch
+from .libkas import repos_fetch
 
 __license__ = 'MIT'
 __copyright__ = 'Copyright (c) Siemens AG, 2017'
@@ -193,17 +193,8 @@ class Config:
             if url is None:
                 # No git operation on repository
                 if path is None:
-                    # In-tree configuration
-                    path = os.path.dirname(self.filename)
-                    (ret, output) = run_cmd(['git',
-                                             'rev-parse',
-                                             '--show-toplevel'],
-                                            cwd=path,
-                                            env=self.environ,
-                                            fail=False,
-                                            liveupdate=False)
-                    if ret == 0:
-                        path = output.strip()
+                    path = Repo.get_root_path(os.path.dirname(self.filename),
+                                              self.environ)
                     logging.info('Using %s as root for repository %s', path,
                                  name)
 
diff --git a/kas/repos.py b/kas/repos.py
index 0b5fb53..4e4e3b7 100644
--- a/kas/repos.py
+++ b/kas/repos.py
@@ -155,3 +155,20 @@ class Repo:
         run_cmd(['git', 'checkout', '-q',
                  '{refspec}'.format(refspec=self.refspec)],
                 cwd=self.path)
+
+    @staticmethod
+    def get_root_path(path, environ):
+        """
+            Check if path is a version control repo and return its root path.
+        """
+        (ret, output) = run_cmd(['git',
+                                 'rev-parse',
+                                 '--show-toplevel'],
+                                cwd=path,
+                                env=environ,
+                                fail=False,
+                                liveupdate=False)
+        if ret == 0:
+            return output.strip()
+
+        return path