parallel (
    "test1" : {
          checkout([
                    $class: 'GitSCM',
                        branches: [[
                            name: 'master'
                        ]],
                        doGenerateSubmoduleConfigurations: false,
                        extensions: [[
                            $class: 'RelativeTargetDirectory',
                            relativeTargetDir: 'test1'
                        ],[
                            $class: 'ScmName',
                            name: 'test1'
                        ]],
                        submoduleCfg: [],
                        userRemoteConfigs: [[
                            credentialsId: 'test',
                            url: 'ssh://git@github.com/test1'
                        ]]
                ])
    },
    "test2" : {
          checkout([
                    $class: 'GitSCM',
                        branches: [[
                            name: 'master'
                        ]],
                        doGenerateSubmoduleConfigurations: false,
                        extensions: [[
                            $class: 'RelativeTargetDirectory',
                            relativeTargetDir: 'test2'
                        ],[
                            $class: 'ScmName',
                            name: 'test2'
                        ]],
                        submoduleCfg: [],
                        userRemoteConfigs: [[
                            credentialsId: 'test',
                            url: 'ssh://git@github.com/test2'
                        ]]
                ])
     },
    "test3" : {
          checkout([
                    $class: 'GitSCM',
                        branches: [[
                            name: 'master'
                        ]],
                        doGenerateSubmoduleConfigurations: false,
                        extensions: [[
                            $class: 'RelativeTargetDirectory',
                            relativeTargetDir: 'test3'
                        ],[
                            $class: 'ScmName',
                            name: 'test3'
                        ]],
                        submoduleCfg: [],
                        userRemoteConfigs: [[
                            credentialsId: 'test',
                            url: 'ssh://git@github.com/test3'
                        ]]
                ])
     }
 )