title: Is there a fix for the "Could not find *gem* in any of the sources" error that doesn't involve deleting Gemfile.lock?
body: <p>I am trying to get my development environment setup on a new computer.</p>
  
  <pre><code>git clone -o heroku git@heroku.com:theirapp.git
  cd theirapp
  bundle
  Fetching gem metadata from https://rubygems.org/......
  Fetching gem metadata from https://rubygems.org/..
  Could not find jquery-rails-2.0.0 in any of the sources
  </code></pre>
  
  <p>After googling this error, the response seems to be to delete <code>Gemfile.lock</code>, then running <code>bundle</code> again. This works, but then I have different versions of gems where I haven't specified a version in <code>Gemfile</code>. Is there a way to fix this error without deleting <code>Gemfile.lock</code>? I'm using Rails 3.2 and Ruby 1.9.3.</p>