[WARNING] Unable to get resource 'org.someorg.project:project-proto:pom:some-version' from repository project-repo (http://repository.somecompany.com/

Do not worry, you are probably just behind a proxy. Try putting a file named "~/.m2/settings.xml " in your home directory's maven directory, or wherever your .m2 directory is:

Make the contents of the file something like this:

<settings>
  <proxies>
   <proxy>
      <active>true</active>
      <protocol>http</protocol>
      <host>proxy.somewhere.com</host>
      <port>8080</port>
      <username>proxyuser</username>
      <password>somepassword</password>
      <nonProxyHosts>www.google.com|*.somewhere.com</nonProxyHosts>
    </proxy>
  </proxies>
</settings>

Replacing all of the relevant bits and removing any unnecessary lines, like username and password, if they are not needed.

Hope that helps.