title: How do I clone a local repo with submodules?
body: <p>Say I recursively clone a repo.</p>
  
  <pre><code>$ git clone --recursive ssh://server/project/client
  Cloning into 'client'...
  remote: Counting objects: 191, done
  remote: Finding sources: 100% (191/191)
  remote: Total 191 (delta 53), reused 159 (delta 53)
  Receiving objects: 100% (191/191), 27.59 KiB | 0 bytes/s, done.
  Resolving deltas: 100% (53/53), done.
  Checking connectivity... done.
  Submodule 'gui' (ssh://server/project/client/gui.git) registered for path 'gui'
  Cloning into 'gui'...
  remote: Counting objects: 3213, done
  remote: Finding sources: 100% (3213/3213)
  remote: Total 3213 (delta 1272), reused 3107 (delta 1272)
  Receiving objects: 100% (3213/3213), 47.88 MiB | 12.05 MiB/s, done.
  Resolving deltas: 100% (1272/1272), done.
  Checking connectivity... done.
  Submodule path 'gui': checked out '7315db8d7a8b36929f7874dc5477359839ec51ce'
  </code></pre>
  
  <p>Now I want to create a local clone of that local repo (perhaps after making and committing changes locally).</p>
  
  <pre><code>$ git clone --recursive client/ client_copy
  Cloning into 'client_copy'...
  done.
  Submodule 'gui' (/home/deployer/client/gui.git) registered for path 'gui'
  fatal: repository '/home/deployer/client/gui.git' does not exist
  Clone of '/home/deployer/client/gui.git' into submodule path 'gui' failed
  </code></pre>
  
  <p>My <code>.gitmodules</code> file looks like this:</p>
  
  <pre><code>[submodule "gui"]
          path = gui
          url = ../client/gui.git
  </code></pre>
  
  <p>Why does this fail, and how can I address the issue?</p>