commit - dcdafdf7db10d59342377a05c8083f2ddb9de664
commit + d87326ab44010855fb3fb6b174f06393981ab44b
blob - 5be4952673eb40b1cf7cc9c1dde1ebc55225ecfa
blob + 43ced4d67ba8e0cf0069e523d5112f6b9d8e6d77
--- NEWS
+++ NEWS
@@ -1,6 +1,8 @@
 0.21.4	UNRELEASED
 
  * Deprecate ``dulwich.objects.parse_commit``.
+
+ * Fix fetching into MemoryRepo. (Jelmer Vernooij, #1157)
 
 0.21.3	2023-02-17
 
blob - 8888696eb32096633c2186145ded8b46ab4e66d2
blob + 4446c75932bed0a4940a1c23faeb9468ff51b542
--- dulwich/object_store.py
+++ dulwich/object_store.py
@@ -1047,6 +1047,16 @@ class MemoryObjectStore(BaseObjectStore):
             f.close()
 
         return f, commit, abort
+
+    def add_pack_data(self, count: int, unpacked_objects: Iterator[UnpackedObject], progress=None) -> None:
+        """Add pack data to this object store.
+
+        Args:
+          count: Number of items to add
+          pack_data: Iterator over pack data tuples
+        """
+        for unpacked_object in unpacked_objects:
+            self.add_object(unpacked_object.sha_file())
 
     def add_thin_pack(self, read_all, read_some, progress=None):
         """Add a new thin pack to this object store.
blob - 7fa631a1860cb55b048412d26832e9334948f493
blob + bcb827796de11c271ad45a28261de67c0b6c6d27
--- dulwich/tests/test_repository.py
+++ dulwich/tests/test_repository.py
@@ -123,6 +123,12 @@ class MemoryRepoTests(TestCase):
         description = b"Some description"
         r.set_description(description)
         self.assertEqual(description, r.get_description())
+
+    def test_pull_into(self):
+        r = MemoryRepo.init_bare([], {})
+        repo = open_repo("a.git")
+        self.addCleanup(tear_down_repo, repo)
+        repo.fetch(r)
 
 
 class RepositoryRootTests(TestCase):