As a plugin developer you can use this plugin as dependency of your plugin by adding a dependency tag to your POM.
To add the latest version of this plugin as a maven dependency, use the following:
<dependency>
    <groupId>org.jenkins-ci.plugins</groupId>
    <artifactId>bitbucket-scm-filter-aged-refs</artifactId>
    <version>59.vc6b_39c26988c</version>
</dependency>