How the results look like?
During cloning you can see the progress and how, step by step, the issues are cloned. On the left, the source issues are displayed, in the middle you see a spinner when cloning is not completed and a 
icon if the cloning is done. On the right side you see a link to the cloned issue and can directly navigate to it (link opens in a new tab).
On top you see the issue that is currently in progress either for cloning, or setting a link to the new parent issue.
Cloning in progress
When cloning is completed, you can quickly navigate to each source or target issue by using the displayed links.
Cloning completed