To go into a particular version you can use this command
git checkout <sha1>
This will go to the particular version and you need to use the full sha1
Note: If you need to find out the sha1 of next commit You should run git log --oneline and stick the output into a text file for reference. Another option, if your history is linear, and easy to figure out how many commits there are from the first commit till master and use
git checkout master~x
(if there are x number of commits), then
git checkout master~(x-1)
Thus you can go to a particular version.