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-rw-r--r--buildstream/_gitsourcebase.py5
1 files changed, 4 insertions, 1 deletions
diff --git a/buildstream/_gitsourcebase.py b/buildstream/_gitsourcebase.py
index 7d07c56cb..38c844c6a 100644
--- a/buildstream/_gitsourcebase.py
+++ b/buildstream/_gitsourcebase.py
@@ -469,7 +469,10 @@ class _GitSourceBase(Source):
self.mirror.tags = self._load_tags(node)
def get_ref(self):
- return self.mirror.ref, self.mirror.tags
+ if self.mirror.ref:
+ return self.mirror.ref, self.mirror.tags
+ else:
+ return None
def set_ref(self, ref_data, node):
if not ref_data: