I have no idea what the "PULL" operation you're talking about is here.
As for executing JMX from the command-line there's no general purpose command-line JMX interface integrated with Windchill, but googling "JMX command-line interface" brings up several general purpose tools along these lines.
There's also wt.util.jmx.RunScript and wt.util.jmx.RunSWScript to be aware of. These command-line tools, which are part of all recent Windchill releases, allow one to run one or more scripts via a javax.script-based scripting engine that is installed in the classpath of the JVM in question. By default Java 6 and higher include a JavaScript engine, but many other scripting engines are available. Invoke these commands without arguments (using "java" from a Windchill shell or "windchill" otherwise) for more usage information.