You can clone with
HTTPS or Subversion.
" Or, you can upload many parts in parallel (great when you have plenty of bandwidth, perhaps with higher than average latency to the S3 endpoint of your choice). If you choose to go the parallel route, you can use the list parts operation to track the status of your upload."
An option to specify number of parallel transfer threads would be VERY VERY useful.
Looks like a duplicate of #2?
Right did not see #2 , closing as duplicate.
#2 was two years ago and no progress in master has been made on a topic of parallel . Any update on status of #2?