Someone

cd current_treebzr export ../child_treecd ../child_treebzr add-from ../current_tree .bzr commit -m "Creating new child with no history"cd ../current_treecat ../child_tree/.bzr/checkout/last-revision \    > .bzr/checkout/pending_mergesbzr commit -m "null merge from child"# At this point current_tree should be able to merge new changes from the child# but the child should have no real history