listing changesets on a branch

Dear List,

I'd like to list the changesets between two commit ids, but only those, that were committed on a specific branch. I tried to use the following command:

git log --branches=*/master rev1..rev2

But the result is not what I expected: i see sommits that were made on an other branch and were not merged to master. Could you please tell me what I am doing wrong?

Thanks in advance, Ákos Tajti