UPDATE
Tasks (i.e. their XML files) can be copied between spaces without changes. A task should have a unique ID only within a space. Two tasks in two spaces can have the same ID.
After you have copied the XML files or checked them out from git, reload the space by clicking the reload button (see below).
Reloading space is the only operation that has to be done manually. Later, we will automate it too in the future “EasyMorph Server Admin Command” action.