[gnome-builder] git: specify "" for default branch

[Christian Hergert <chergert src gnome org>]

commit aa6800ad4371115a5d1c8e225e3995cb29065f4e
Author: Christian Hergert <chergert redhat com>
Date:   Thu May 6 13:53:48 2021 -0700

    git: specify "" for default branch

 src/plugins/git/daemon/test-clone.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)
---
diff --git a/src/plugins/git/daemon/test-clone.c b/src/plugins/git/daemon/test-clone.c
index d24920cc7..16a5155af 100644
--- a/src/plugins/git/daemon/test-clone.c
+++ b/src/plugins/git/daemon/test-clone.c
@@ -92,7 +92,7 @@ test_clone (IpcGitService *service,
   g_dbus_interface_skeleton_export (G_DBUS_INTERFACE_SKELETON (progress), conn, PROGRESS_PATH, &error);
   g_assert_no_error (error);
 
-  ipc_git_service_call_clone (service, url, path, NULL, g_variant_dict_end (&opts), PROGRESS_PATH, NULL, 
test_clone_cb, g_object_ref (progress));
+  ipc_git_service_call_clone (service, url, path, "", g_variant_dict_end (&opts), PROGRESS_PATH, NULL, 
test_clone_cb, g_object_ref (progress));
 }
 
 gint