I tried installing this via npm-ssb
npm install git-ssb -g --registry=http://localhost:8043/
this only fetched one package, which is a lot less than you get via the npm registry.
and when running I got this error
$ git fetch ssb
module.js:457
throw err;
^
Error: Cannot find module 'git-remote-ssb/git-remote-ssb'
at Function.Module._resolveFilename (module.js:455:15)
at Function.Module._load (module.js:403:25)
at Module.require (module.js:483:17)
at require (internal/module.js:20:19)
at Object.<anonymous> (/home/dominic/.nvm/versions/node/v6.5.0/lib/node_modules/git-ssb/bin/git-remote-ssb:3:1)
at Module._compile (module.js:556:32)
at Object.Module._extensions..js (module.js:565:10)
at Module.load (module.js:473:32)
at tryModuleLoad (module.js:432:12)
at Function.Module._load (module.js:424:3)