title: Bitbake: How to only fetch the sources?
body: <p>There is a project in which we use project yocto, and our metas fetch source from some remote git repositories.</p>
  
  <p>The problem is that these repositories are only accessible in some particular situations/specific times.</p>
  
  <p>Therefore, I need a way to fetch the repos (when they are available), as to have them locally, but not build anything at that time.</p>
  
  <p>Is this possible?</p>