Re: About turn
Nope. Clearcase still sucks and always will.
Just spin up your own Git servers. If you currently have pretty much anything nontrivial in-house and don't need access outside your VPN then it's trivial and a really tiny load compared to anything else.
If you do need to expose it without VPN then it's not trivial, but not hard.
The bugtrackers etc are also all open source, so the entire stack can be ported away.
Take this opportunity to look at doing so.