If you do want to go as far as downloading/cloning the repo, you can run the following command to get similar stats:
git shortlog -s -n --all --no-merges
That's on the entire timespan of the repo, if you want to add a date, you can use the --since and --before tags, for example:
git shortlog -s -n --all --no-merges --since="22 Aug 2017" --before="01 Sept 2017"
The above will return all git commits between 22 Aug 2017 and 01 Sept 2017. You can remove the before if you just want until the current date.
It won't return the exact same format, as that looks to be something more custom (like a script or something) but it will give you what you need.
It doesn't provide percentages so that I may need to further research.
Edit: There's a further list of commands here.
https://gist.github.com/eyecatchup/3fb7ef0c0cbdb72412fcYou'll have to know how to clone the repo and install git in order to run these though.