How to find last merge in git?

Question

For a web site, I have master and staging, I have worked on staging for about 10 days. How do I tell for sure what has changed since my last merge, or when that merge was? M

Answer 1

git log --merges -n 1

works well. From man git-log:

   --merges
       Print only merge commits. This is exactly the same as --min-parents=2.

Here's an example using --pretty=format:"%H" to get just the SHA.

$ git log --pretty=format:"%H" --merges -n 1
f32e1f13eef7d5843e8063b8709d01af6dcd5dbf

Credit goes to Jefromi for their comment on another answer.