how to find the corresponding version of yolov5?

[shamoqianting]

I need to work under tensorRT 6, it seems that I have to use yolov5-3.0 or yolov5-4.0.
But how can I find the corresponding commit on the master branch of yolov5 ?
All the tags of realease versions of yolov5 miss some modules like "utils.downloads" when I try to run yaml2cfg.py
Thank you very much

`python3 yaml2cfg.py

Traceback (most recent call last):
File "yaml2cfg.py", line 3, in
from utils.downloads import *
ModuleNotFoundError: No module named 'utils.downloads'`