diff --git a/lib/adapter/git_adapter.py b/lib/adapter/git_adapter.py
index 0ff52a0..8aa1864 100644
--- a/lib/adapter/git_adapter.py
+++ b/lib/adapter/git_adapter.py
@@ -124,7 +124,7 @@ class GitRepositoryAdapter(RepositoryAdapter):    #pylint: disable=abstract-meth
             raise RuntimeError(
                 "Do not known how to handle this repository: %s" % cls._repository_url)
 
-        return ['git', 'rev-parse', '--short', 'HEAD']
+        return ['git', 'rev-parse', '--short', 'HEAD', "--"]
 
     @classmethod
     def save_state(cls, state):
@@ -157,6 +157,6 @@ class GitRepositoryAdapter(RepositoryAdapter):    #pylint: disable=abstract-meth
         The list is used to invalidate the cache.
         """
         current_state = cls.get_state()
-        if current_state is None:
-            return ['git', 'ls-tree', '--full-tree', '-r', '--name-only', 'HEAD']
-        return ['git', 'diff', '--name-only', current_state, 'HEAD']
+        if not current_state:
+            return ['git', 'ls-tree', '--full-tree', '-r', '--name-only', 'HEAD', "--"]
+        return ['git', 'diff', '--name-only', current_state, 'HEAD', "--"]
diff --git a/lib/fetch.py b/lib/fetch.py
index df85aea..c33d87d 100644
--- a/lib/fetch.py
+++ b/lib/fetch.py
@@ -115,7 +115,7 @@ def _update_adapter(adptr):
 
     errorcode, output = _run_cmd(cmd)
     if errorcode:
-        _log("\nERROR:\n---\n" + output + "\n---\nCould not update %s" % adptr)
+        _log("\nERROR:\n---%s\n" % output.decode("utf-8") + "\n---\nCould not update %s" % adptr)
         return False
 
     # Getting current repository state