Title says it all. No changes on my end except SourceTree updated yesterday. MacPorts installed command line git works fine with same repo.
Where can I specify which key to use, SourceTree is not picking it up from my environment.
Solved.
I'm short on the hows and whats but the why was my OpenSSH identity had been removed from my keychain, I can't say with 100% certainty but I believe and evidence suggests this was related to an OSX update that installed while I was logged in.
The reason it kept working in the Git CLI was, that it wasn't - I was getting prompted for my passphrase when pushing/pulling and didn't think about it being out of the ordinary since I'm used to that in my Linux terminals.
For anyone encountering this, add your OpenSSH private key to your keychain by opening a terminal and entering the following.
ssh-add -k [path_to_private_key]
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