Added a new branch
Commiting in the detached head state
Another no-branch commit
Another no-branch commit
New commit in a no-branch state
Merge branches 'old-new-branch' and 'old-old-branch' into t1

To check that the merge won't discard changes in the t1 branch and everything will go right. (dumb, yeap)
Merge branch 't1'

Just merging t1