Update ONNX script

tools/onnx

@@ -19,12 +19,12 @@ bold() {
 git_sync() {
     mkdir -p "${third_party}"
     if [ -d "${third_party}/${1}" ]; then
-        git -C "${third_party}/${1}" fetch --quiet -p
-        git -C "${third_party}/${1}" reset --quiet --hard origin/master
+        git -C "${third_party}/${1}" pull --quiet --prune
     else
         git -C "${third_party}" clone --quiet --recursive ${2}
     fi
-    git -C "${third_party}/${1}" submodule update --quiet --init
+    git -C "${third_party}/${1}" submodule sync --quiet
+    git -C "${third_party}/${1}" submodule update --quiet --init --recursive
 }
 
 clean() {