Converting a Composer dependency to git for editing

I'm adding a new feature to ZF's Problem-Details component and it's easiest to do this within the context of the application I'm developing.

The component lives in vendor/zendframework/zend-problem-details and was installed using composer require so doesn't have its own git repository as the distribution zip file was used to install it.

To change it to a git repository, we can use the --prefer-source option and specify a branch like this:

$ composer require --prefer-source zendframework/zend-problem-details:dev-master

I now have a git checkout of the component with two remotes: origin and composer. I changed origin to my fork and then create a branch to work on:

$ cd vendor/zendframework/zend-problem-details
$ git remote rm origin
$ git remote add origin git@github.com:akrabat/zend-problem-details.git
$ git checkout -b my-new-feature

We're now off the races and I can easily develop my new feature and push to origin as normal and then hopefully raise a PR.