Let\'s say people have been working on the trunk and on a branch of a Subversion repository. I want to discard any changes on the trunk, and replace it with a copy of the br
I think what you are trying to do is merge two trees. Below I quote the documentation from tortoisesvn (https://tortoisesvn.net/docs/release/TortoiseSVN_en/tsvn-dug-merge.html)
".... What you are asking Subversion to do is:" Calculate the changes needed to get [From] the trunk head revision [To] the trunk head revision branch, and applying them changes to my working copy (of the trunk). The net result is that the trunk now looks exactly like the branch."
In your case, the trunk is from, and to is the branch
I hope this is helpful