Does git return specific return error codes?

Question

Like merging errors, or rebase errors. Does it have a unique error code?

Answer 1

I set-up a test to fail. This is what I got:

$ git merge newbranch
Auto-merging test.txt
CONFLICT (content): Merge conflict in test.txt
Automatic merge failed; fix conflicts and then commit the result.

$ echo $?
1

Git returns 0 when it merges correctly, as expected.