Git svn dcommit -> ignore one commit

Hi.

In my company, we need to use svn repository, but we want to use git. We decide to use git svn. Everyone will commit and push changes to git repository. One guy will pull from this repository and dcommit it to subversion. Everything looks ok, but in this repo we need some submodule. This submodule is already in subversion as "external". I have a commit, that adds submodule. This commit always fails when I use git svn dcommit. I can remove this commit by git rebase, but i have to do this always when I use dcommit. My question: is there posibility to make dcommit ignore one specyfic commit?

Thanks Dominik "Socek" Długajczyk