java -jar jenkins-cli.jar -s http://localhost:8080/ install-plugin http://updates.jenkins-ci.org/latest/job-dsl.hpi

reports

Installing a plugin from http://updates.jenkins-ci.org/latest/job-dsl.hpi

but fails to install the plugin

java -jar jenkins-cli.jar -s http://localhost:8080/ list-plugins

doesn't list it, neither does the GUI

curl -X POST -d '<jenkins><install plugin="job-dsl@1.34" /></jenkins>' --header 'Content-Type: text/xml' http://localhost:8080/pluginManager/installNecessaryPlugins

does install the plugin