The readme is understandable and the failure modes means it degrades to an ordinary git repo.
> This git command "clones" an external git repo into a subdirectory of your repo. Later on, upstream changes can be pulled in, and local changes can be pushed back. Simple.
> This git command "clones" an external git repo into a subdirectory of your repo. Later on, upstream changes can be pulled in, and local changes can be pushed back. Simple.