A script to manually iterate over git commits. Use qj/qk to navigate.

git-inspect.sh

DIFF_NUMBER=1

while read -n1 -r -p "$DIFF_NUMBER:" && [[ $REPLY != q ]]; do
  case $REPLY in
    j)
      DIFF_NUMBER=`expr $DIFF_NUMBER + 1`
    ;;
    k)
      DIFF_NUMBER=`expr $DIFF_NUMBER - 1`
    ;;
    *)
  esac

  git diff HEAD~$DIFF_NUMBER..HEAD~`expr $DIFF_NUMBER - 1`
  echo
done