diff --git a/git_config.py b/git_config.py
index 14c4c11af..5559657ae 100644
--- a/git_config.py
+++ b/git_config.py
@@ -222,6 +222,12 @@ class GitConfig:
             value = "true" if value else "false"
         self.SetString(name, value)
 
+    def SetInt(self, name: str, value: int) -> None:
+        """Set an integer value for a key."""
+        if value is not None:
+            value = str(value)
+        self.SetString(name, value)
+
     def GetString(self, name: str, all_keys: bool = False) -> Union[str, None]:
         """Get the first value for a key, or None if it is not defined.
 
diff --git a/project.py b/project.py
index 8da2efc8e..f3ae9ab1d 100644
--- a/project.py
+++ b/project.py
@@ -3316,6 +3316,15 @@ class Project:
                 remote.ResetFetch(mirror=True)
             remote.Save()
 
+        # Disable auto-gc for depth=1 to prevent hangs during lazy fetches
+        # inside git checkout for partial clones.
+        effective_depth = (
+            self.clone_depth or self.manifest.manifestProject.depth
+        )
+        if effective_depth == 1:
+            self.config.SetBoolean("maintenance.auto", False)
+            self.config.SetInt("gc.auto", 0)
+
     def _InitMRef(self):
         """Initialize the pseudo m/<manifest branch> ref."""
         if self.manifest.branch:
diff --git a/tests/test_git_config.py b/tests/test_git_config.py
index cf6e77939..e1604bd76 100644
--- a/tests/test_git_config.py
+++ b/tests/test_git_config.py
@@ -166,6 +166,30 @@ class GitConfigReadWriteTests(unittest.TestCase):
         config = self.get_config()
         self.assertIsNone(config.GetBoolean("foo.bar"))
 
+    def test_SetInt(self):
+        """Test SetInt behavior."""
+        # Set a value.
+        self.assertIsNone(self.config.GetInt("foo.bar"))
+        self.config.SetInt("foo.bar", 10)
+        self.assertEqual(10, self.config.GetInt("foo.bar"))
+
+        # Make sure the value was actually written out.
+        config = self.get_config()
+        self.assertEqual(10, config.GetInt("foo.bar"))
+        self.assertEqual("10", config.GetString("foo.bar"))
+
+        # Update the value.
+        self.config.SetInt("foo.bar", 20)
+        self.assertEqual(20, self.config.GetInt("foo.bar"))
+        config = self.get_config()
+        self.assertEqual(20, config.GetInt("foo.bar"))
+
+        # Delete the value.
+        self.config.SetInt("foo.bar", None)
+        self.assertIsNone(self.config.GetInt("foo.bar"))
+        config = self.get_config()
+        self.assertIsNone(config.GetInt("foo.bar"))
+
     def test_GetSyncAnalysisStateData(self):
         """Test config entries with a sync state analysis data."""
         superproject_logging_data = {}