During the hackathon this issue came up and I also have a user on the forums who has the same question. To be clear it isn't possible to sort reduce results, but it might be possible to rewrite your map function in order to obtain the results I want.
|Field||Original Value||New Value|
|Assignee||MC Brown [ mccouch ]|
|Fix Version/s||2.0.1 [ 10399 ]|
|Fix Version/s||2.0 [ 10114 ]|
|Status||Open [ 1 ]||Resolved [ 5 ]|
|Resolution||Fixed [ 1 ]|
|Status||Resolved [ 5 ]||Closed [ 6 ]|