Jenkins build clean command

jenkins_clean

 Jenkins.instance.getAllItems(AbstractProject.class).each { project ->
    def jobName = project.fullName
    def job = Jenkins.instance.getItemByFullName(jobName)  
    if (job) {
        println("Found Job : ${job.name}");
        
        job.getBuilds().each { build -> 
            println("- Deleting #${build.number}");
            build.delete()
        }

        job.nextBuildNumber = 302
        job.save()
    }
  }