Is there a git-svn windows client something like TortoiseSVN?
TortoiseGit (https://tortoisegit.org/) added basic support for git-svn in release 0.8.1.0:
The release log says:
Add Basic Git-SVN Operation:
Add SVN DCommit Command
Add "SVN Rebase" and "SVN DCommit"command at shell contextmenu
Support Git svn-clone at clonedialog.
The easiest way I found was to use the git gui, and add a git svn dcommit and git svn rebase command to the Tools menu.
If you install msysGit, it will even put a 'Git GUI here' command in your context menu.
This has the advantage of not requiring any additional software apart from git itself, and will work on every platform that git (gui) runs on.
Edit: I should mention that this is exactly the way I have been productively using git against our svn-repos for a few months now. Works just fine. And it's the same on Windows, Linux, whatever. So no need to use different tools for the same job, depending on the OS.