git-commit.txt: better description what it does

diff --git a/replace-object.h b/replace-object.h
index 9345e105ddcaa38cf9e856df70d960245a3b696c..16528df942f79e3d7ce65d99e0103395d0c69f51 100644 (file)
--- a/replace-object.h
+++ b/replace-object.h
@@ -10,6 +10,8 @@ struct replace_object {
        struct object_id replacement;
 };
 
+void prepare_replace_object(struct repository *r);
+
 /*
  * This internal function is only declared here for the benefit of
  * lookup_replace_object().  Please do not call it directly.