I updated the git client from 2.10.0 to 2.16.1 and it now says:
WARNING: 'git lfs clone' is deprecated and will not be updated
with new flags from 'git clone'
'git clone' has been updated in upstream Git to have comparable
speeds to 'git lfs clone'.
I suppose the answer is that git lfs clone is now pretty much the same thing as git clone and the separate command will disappear.