Update submodule url

Author: krishung5

build.py

@@ -1785,11 +1785,6 @@ def tensorrtllm_prebuild(cmake_script):
     cmake_script.cmd("mv tensorrtllm/inflight_batcher_llm/cmake tensorrtllm")
     cmake_script.cmd("mv tensorrtllm/inflight_batcher_llm/CMakeLists.txt tensorrtllm")
 
-    cmake_script.cmd(
-        "cd tensorrtllm_backend && git submodule set-url -- tensorrt_llm https://github.com/NVIDIA/TensorRT-LLM.git"
-    )
-    cmake_script.cmd("cd tensorrtllm_backend && git submodule sync")
-
 
 def backend_build(
     be,
@@ -1811,10 +1806,20 @@ def backend_build(
     cmake_script.comment()
     cmake_script.mkdir(build_dir)
     cmake_script.cwd(build_dir)
-    cmake_script.gitclone(backend_repo(be), tag, be, github_organization)
 
     if be == "tensorrtllm":
+        cmake_script.cmd(
+            "git clone --single-branch --depth=1 -b {} https://github.com/triton-inference-server/tensorrtllm_backend tensorrtllm".format(
+                tag
+            )
+        )
+        cmake_script.cmd(
+            "cd tensorrtllm_backend && git submodule set-url -- tensorrt_llm https://github.com/NVIDIA/TensorRT-LLM.git"
+        )
+        cmake_script.cmd("cd tensorrtllm_backend && git submodule sync")
         tensorrtllm_prebuild(cmake_script)
+    else:
+        cmake_script.gitclone(backend_repo(be), tag, be, github_organization)
 
     cmake_script.mkdir(repo_build_dir)
     cmake_script.cwd(repo_build_dir)