diff --git a/src/main/java/net/geedge/asw/module/app/service/impl/GitServiceImpl.java b/src/main/java/net/geedge/asw/module/app/service/impl/GitServiceImpl.java
index 12d604c..5005f63 100644
--- a/src/main/java/net/geedge/asw/module/app/service/impl/GitServiceImpl.java
+++ b/src/main/java/net/geedge/asw/module/app/service/impl/GitServiceImpl.java
@@ -385,12 +385,6 @@ public class GitServiceImpl implements IGitService {
             RevCommit oldCommit = revWalk.parseCommit(repository.resolve(oldCommitId));
             RevCommit newCommit = revWalk.parseCommit(repository.resolve(newCommitId));
 
-            if (newCommit.getParentCount() > 0) {
-                final RevWalk rw = new RevWalk(repository);
-                oldCommit = rw.parseCommit(newCommit.getParent(0).getId());
-                rw.dispose();
-            }
-
             // oldTree
             CanonicalTreeParser oldTree = new CanonicalTreeParser();
             oldTree.reset(repository.newObjectReader(), oldCommit.getTree());