I realise that this has been asked before but the thread seems about 9 months old. Just want to check if the newer versions have added this capability.
I seemed to have goofed up with one command and desperately want to rollback.
They are still working on this: https://jira.springsource.org/browse/ROO-911
This feature will solve this problem by optionally keeping everything in a local git repo (so you can always roll back to the last version).
Update: From the JIRA comments, it seems like a first working version is available