[raghava]

  for c in `git log --oneline --reverse | awk '{print  $1}'`
  do
    clear; echo "$c"; git --no-pager show $c:README; sleep 1; 
  done

is what one could use on a terminal

[oneeyedpigeon]

You can remove the pipe to awk by replacing:

  --oneline

with

  --pretty=format:"%h"