git-svn fetch after tag conversion?

I'm converting a large SVN repository to a Git repository. I've run the first step of `git svn fetch` and now I have all of my branches, tags, and trunk. However my tags are still just branches, I have not converted them yet.

As I transition my team over to use Git, I wonder if it is possible to convert the tag-branches to real tags and still be able to do `git svn fetch` afterwards to continue to pull in changes. My goal is to have the git repository as ready as possible so that everyone can swap to it at once (and it'll be less downtime before i can push it to github). There are some scenarios I worry about:

- Will git re-fetch the tag-branches if they technically don't exist
anymore (they would be real tags)?
- What if a change is made to a tag, what will git-svn do?
- New tags created, will those just create new tag-branches and I can
convert them later?

Thanks in advance.