Git: How to make an experimental branch head/master?

Question

Ok, I am pretty new to git, probably this was asked and answered already. Probably I messed up things...

Now, there once was a branch master. I committed some funky stuff that didn't work too well. Then I went back one revision, when everything was still well, and created an experimental branch and checked it out. I started working on that branch and things went very well, no need for the funk in master's head. So, now I am dozens of commits in the experimental branch and it is not experimental anymore. So I checked out master, and went to the branching revision (one before head) and successfully merged with experimental. Now git branch gives me

* (no branch)
  experimental
  master

How can I make it master and master's head?

Answer 1

From the detached HEAD, you could delete the master branch and create a new branch named master.

git branch -d master
git branch master