What to do with commit made in a detached head

Using git I made something like this

git clone
git checkout {a rev number tree rev before} (here I started to be in a detached head state)
//hacking
git commit
//hacking
git commit
(some commit where made on origin/master)
git pull (which does complete because there was some error due to the fact that I'm no more on master)

Because it said to me that I can still commit when in a detached head state, I did so.
But now I want to like merge my detached head branch and my local master branch, and then push my bunch of changes to origin/master.

So my question is how could I merge the master branch with my actual state (detached head)