Couldn't fetch submodule DEMO by git clone

[SuwenJunliu]

Hi there,
When I clone this repository by

git clone --recursive https://github.com/geodynamics/mineos.git

It works for Mineos but fails for DEMO, and it shows

Submodule 'DEMO' (git://vcs.geodynamics.org/mineos_data) registered for path 'DEMO'
Cloning into '/media/junliu/mineos/test/mineos/DEMO'...
fatal: Unable to look up vcs.geodynamics.org (port 9418) (Name or service not known)
fatal: clone of 'git://vcs.geodynamics.org/mineos_data' into submodule path '/media/junliu/mineos/test/mineos/DEMO' failed
Failed to clone 'DEMO'. Retry scheduled

It is the same issue as #9, but it seems to be caused by a different reason. I tried to clone the repository directly by

git clone git@vcs.cse.ucdavis.edu:mineos_data

and it shows

Cloning into 'mineos_data'...
git@vcs.cse.ucdavis.edu: Permission denied (publickey,hostbased).
fatal: Could not read from remote repository.

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

So I guess I don't have the right to access the repository. I also check the website of Geodynamics, but it ends up with this repo after searching. Is there any way to get the DEMO data (Such as Zenodo)?