How to sync a fork with upstream in Python

import subprocess
import sys


def sync_fork_with_upstream():
    """Simulate syncing a forked repo with upstream via git commands."""

    # Mock git operations: pretend to fetch from upstream and merge into main
    fetch_result = subprocess.run(
        ["git", "fetch", "upstream"],
        capture_output=True, text=True
    )
    if fetch_result.returncode != 0:
        return f"Fetch failed: {fetch_result.stderr.strip()}"

    merge_result = subprocess.run(
        ["git", "merge", "upstream/main", "--no-edit"],
        capture_output=True, text=True
    )
    if merge_result.returncode != 0:
        return f"Merge failed: {merge_result.stderr.strip()}"

    return "Fork synced successfully with upstream/main"


if __name__ == "__main__":
    # Run the mock sync and print the result
    result = sync_fork_with_upstream()
    print(result)