diff --git a/commit0/harness/spec.py b/commit0/harness/spec.py
index 2036ded..880f0d3 100644
--- a/commit0/harness/spec.py
+++ b/commit0/harness/spec.py
@@ -106,14 +106,12 @@ def make_repo_script_list(self) -> list[str]:
         """
         specs = self.instance["setup"]
         repo = self.instance["repo"]
-        env_setup_commit = self.instance["reference_commit"]
         base_commit = self.instance["base_commit"]
 
         setup_commands = [
             f"git clone -o origin https://github.com/{repo} {self.repo_directory}",
             f"chmod -R 777 {self.repo_directory}",  # So nonroot user can run tests
             f"cd {self.repo_directory}",
-            f"git reset --hard {env_setup_commit}",
             # Remove the remote so the agent won't see newer commits.
             "git remote remove origin",
             f"uv venv --python {specs['python']}",