In one of my repositories on GitHub, some commits are missing. I am pretty sure about it:

and clicking on the link "11 commits" yields a page with the message "No commits found for <user>". A possible cause is a --force commit that overwrote other commits.

Therefore I'd like to rummage around in the project's history including the dead branches, for example using git reflog. I can't do it by cloning or forking the project, because reflog acts on the local repository and therefore does not see the dead branches.

So: is there a way to run Git commands (here, reflog) directly on GitHub?

Alternatively, does anyone know of a way to clone the GitHub repository together with its dead branches?