At 1/100 speed, light would be so redshifted that you wouldn't be able to perceive it. However, some X-rays (1-10nm) would be redshifted into the visible range (400 to 700nm).
I guess this means you would have x-ray vision. But you would see little to nothing since our environment normally does not include significant levels of X-rays.
We don't have release branches, the commit is just tagged as being currently deployed in production.
People merge their feature branches to master during working hours (by merging CI validated PRs) and release when they get a chance. Normally do about 10-20 releases per day.