(In reply to Ionuț Goldan [:igoldan] from comment #0)
A quick solution would be to postprocess mouse clicks. If the user double clicks, he'd copy only the shorter hash.
I think the problem with little shortcuts like this is that the only people who know about this sort of thing are those who implement it (or those who figure it out by mistake).
I don't have any plans to change any information in the Jobs view, but I'd be open to you doing that since people need the full hash for use with hg. We should make sure to get feedback from Aryx/code sheriffs on this sort of change though, in case there is some reason they'd want it to be short.