Checkout repo submodules recursively (#1937)

Summary:
In bisection workflow, we found sometimes it fails to checkout recursive modules with `git checkout --recurse-submodules`, so we are adding another `git submodule update --init --recursive` command to make sure all submodules are being checked out.

Failed example workflow: https://github.com/pytorch/benchmark/actions/runs/6104757433

Success workflow: https://github.com/pytorch/benchmark/actions/runs/6313591947/job/17141994764

Pull Request resolved: #1937

Reviewed By: atalman

Differential Revision: D49639212

Pulled By: xuzhao9

fbshipit-source-id: 376947e38e4a85e7bdbbbdd14632632e2b505cbd

utils/gitutils.py

@@ -137,6 +137,8 @@ def checkout_git_commit(repo: str, commit: str) -> bool:
         cleanup_local_changes(repo)
         command = ["git", "checkout", "--recurse-submodules", commit]
         subprocess.check_call(command, cwd=repo, shell=False)
+        command = ["git", "submodule", "update", "--init", "--recursive"]
+        subprocess.check_call(command, cwd=repo, shell=False)
         return True
     except subprocess.CalledProcessError:
         # Sleep 5 seconds for concurrent git process, remove the index.lock file if exists, and try again
@@ -148,6 +150,8 @@ def checkout_git_commit(repo: str, commit: str) -> bool:
             cleanup_local_changes(repo)
             command = ["git", "checkout", "--recurse-submodules", commit]
             subprocess.check_call(command, cwd=repo, shell=False)
+            command = ["git", "submodule", "update", "--init", "--recursive"]
+            subprocess.check_call(command, cwd=repo, shell=False)
             return True
         except subprocess.CalledProcessError:
             print(f"Failed to checkout commit {commit} in repo {repo}")