How to find the github repository associated with a heroku app?

Question

This question is quite simple. I have a heroku app deployed, and I cannot find it's source code.

How can we retrieve the github repository url for a given heroku app via either the heroku CLI or by the heroku web interface?

Edit: yes, this has been troubling me for over a year now

What I've tried

I have tried heroku git:clone -a APP-NAME which copies the repository (from heroku?) to local. After cding into it, and trying to get the github remote url

git config --get remote.origin.url

but that returns blank. I also tried

git remote show origin  
fatal: 'origin' does not appear to be a git repository
fatal: Could not read from remote repository.

Please make sure you have the correct access rights
and the repository exists.

Answer 1

I just tried heroku slugs:download -a myapp and get

Warning: slugs:download is not a heroku command.

You would need to install the heroku/heroku-slugs plugin first, in order for that command to be recognized.

heroku plugins:install heroku-slugs

But try first, as you did

heroku git:clone -a APP-NAME

And then git log -1: that will give you the SHA1 of the latest commit.

You can then do on GitHub a Commit search by hash.
Example:

https://github.com/github/gitignore/search?q=hash%3A124a9a0ee1d8f1e15e833aff432fbb3b02632105&type=Commits

---

The OP stevec mentions in the comments using "How to clone all repos at once from GitHub?" to handle more than 100 repositories and (critically) download the private ones too (not just public).
That is: write a bash script that clones every repository on my account and somehow searches for a particular SHA.

I suggests a simple git log -1 SHA, or;, following "How to check if the commit exists in a Git repository by its SHA-1":

git rev-parse -q --verify "$sha^{commit}" > /dev/null

The OP adds:

I realised your initial solution definitely works (even for private repos).

heroku git:clone -a APP-NAME
git log -1, 
https://github.com/search?q=hash%3A<SHA>