Test development branch with composer

composer.json

{
    "repositories": [
        {
            "type": "vcs",
            "url": "https://github.com/you/package.git"
        }
    ],
    "require": {
        "you/package": "dev-bugfix/your-dev-branch as 1.5.x-dev"
    }
}

I always forget how to test a development branch in an application. So I wrote down the modifications to my composer.json.
Please adjust the 1.5.x-dev to be the newest version of your package.
After that run composer update you/package to install the dev branch.

What could also work (untested):

composer config repositories.repo-name vcs https://github.com/you/package.git
composer require dev-bugfix/your-dev-branch as 1.5.x-dev
composer update you/package

If you forked a repository, point the original repository in require but use your branch name. If it trows an error, you can see the branch name in the list of the error.

Then use composer update originalteam/rep