How do I determine which changes in one branch are missing from another?

I'm using git. I have a branch, apifixes, that was branched from master some time ago. Most, but not all, of the changes from the apifixes branch have been merged back into master. At least, I believe this is the case, because when I try to do

git branch -d apifixes

I get the following error:

error: The branch 'apifixes' is not an ancestor of开发者_运维知识库 your current HEAD.

How can I tell which changes are in apifixes but not in master?

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git log master..apifixes

show commits reachable from apifixes, but not from master

if you want to show the difference between the two, use git diff instead

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git log --oneline --left-right --cherry-pick master...apifixes (note the three dots ...) might be what you want.