How does github work(looking for rev)

[vsub_]

For example if I want to check the code in some rev,how can I find the page with that rev.

Lets say I want to see for example 0.8.1-127...how can I find the page that contains that rev.
I was using the buildbot but either there is a bug or that's how the buildbot work...at some point,some revs are removed(mostly not compiled)and the order becomes wrong
v0.7.5-54-g2347bc8
v0.8.1-125-gf5da5f4
v0.7.6-1386-gc8bbad2