Failing composer require. History possibly rewritten

Hi Adam, tried using this as a dependency today and got the following error. Is there a way you can update/sync packagist to know about the actual latest commit? It seems to be trying to clone a commit that doesn't exist:

```
$ composer require adam-paterson/watson-common
Using version ^1.0@dev for adam-paterson/watson-common
./composer.json has been updated
Loading composer repositories with package information
Updating dependencies (including require-dev)
Package operations: 27 installs, 0 updates, 0 removals
- Installing adam-paterson/watson-common (dev-master 3cba41b): Cloning 3cba41bd77 from cache
3cba41bd775e847940f3603c51c12aacc9ce446c is gone (history was rewritten?)
Failed to download adam-paterson/watson-common from source: Failed to execute git checkout '3cba41bd775e847940f3603c51c12aacc9ce446c' -- && git reset --hard '3cba41bd775e847940f3603c51c12aacc9ce446c' --

fatal: reference is not a tree: 3cba41bd775e847940f3603c51c12aacc9ce446c

Now trying to download from dist
- Installing adam-paterson/watson-common (dev-master 3cba41b): Downloading (failed)
Installation failed, reverting ./composer.json to its original content.

[Composer\Downloader\TransportException]
The "https://api.github.com/repos/adam-paterson/watson-common/zipball/3cba41bd775e847940f3603c51c12aacc9ce446c" file could not be downloaded (HTTP/1.1 302 Found)

```