Using devtools' github_install without force = TRUE
<p>I use devtools and after I updated to R 3.3.1 I have this message every time I install something via Github.</p>

<pre><code>Skipping install of 'PACKAGE' from a github remote, the SHA1 (123456) has not changed since last install.
  Use `force = TRUE` to force installation
</code></pre>

<p>Anybody had this issue too?</p>