diff --git a/git_config.py b/git_config.py
index 6ea505f..bc7ed45 100644
--- a/git_config.py
+++ b/git_config.py
@@ -172,6 +172,11 @@
       self._branches[b.name] = b
     return b
 
+  def GetSubSections(self, section):
+    """List all subsection names matching $section.*.*
+    """
+    return self._sections.get(section, set())
+
   def HasSection(self, section, subsection = ''):
     """Does at least one key in section.subsection exist?
     """