When I use

{{
[http]
sslCAInfo = <c:/path/to/FILE.pem>
}}

SourceTree works correctly.

However, if I try to add a specific per-HTTP-server setting like

git config --global http.bitbucket.sslCAInfo c:/path/to/FILE.pem

[here, our internal server is named "bitbucket"]

which results in this in ~/.gitconfig:

{{
[http "bitbucket"]
sslCAInfo = <c:/path/to/FILE.pem>
}}

Then,

1. open Clone Repository
2. hit the globe to browse for a repo
3. select one
4. hit OK
5. the client throws an error about self-signed cert after Repository Type

Not a huge deal, but this means the CA info for any other git servers I use has to be added to that pem, instead of it only applying where I want it to apply. Other git tools work fine with the more specific config.