More feedback on large/long operations

[pipelineoptika]

On the odd occasion, git will run some housekeeping on a fetch or pull, and GitX won't return control until that's finished, as it's not safe to do so.

I often can't tell if GitX is actually doing something or has frozen (which has happened to me once or twice). It'd be great if we could pull some extra info about what's going on in the background, particularly if it's a big operation like a gc, or if it's waiting on hooks, etc.

[pipelineoptika]

GitX is almost certainly not at fault. The "freezes" were on the remote git process.