git and "dumb protocols"

Hi,

Is it possible with git to push to a server on which git is not
installed, and if so, how?

From the man page of git, sftp doesn't seem supported, and ssh://
complains about git-receive-pack not being installed on the server.

The man page documents a rsync:// protocol, but

$ git push rsync://some.location.com/
fatal: I don't handle protocol 'rsync'
$ 

What am I missing?

Thanks,

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