How to know first revisions on svn branches ?

So , if you are working as builder who merge the branches to the trunks , and find conflicts and all that *** * , I think that command will help you .

This will help you the first revision of the branch , so you can only merge the needed revisions

svn log BRANCH_LINK --stop-on-copy
The last revision will be the revision of copying .
Merging of course will be easy like this

svn merge -r REVISION:HEAD BRANCH_LINK

Assuming that your current directory is the working copy .