import com.atlassian.jira.component.ComponentAccessor
def issueLinkManager = ComponentAccessor.issueLinkManager
def projectManager = ComponentAccessor.projectManager
def issueManager = ComponentAccessor.issueManager
//Specify the project key
final def projectKey = ''
def project = projectManager.getProjectByCurrentKey(projectKey)
def issues = issueManager.getIssueObjects(issueManager.getIssueIdsForProject(project.id))
issues.collect {
issueLinkManager.getOutwardLinks(it.id).findAll {
it.issueLinkType.name == 'Cloners'
}.collect {
it.sourceObject.key
}
}.sort().flatten()