Find Git Branching Point Between Branch

➜ pet git:(master) git --no-pager log --oneline -1 2422e70 (HEAD -> master, origin/master) update README.md ➜ pet git:(master) git checkout -b testing Switched to a new branch 'testing' ➜ pet git:(testing) git commit --allow-empty -sam "first" [testing 8210c2d] first ➜ pet git:(testing) git commit --allow-empty -sam "second" [testing feb9b4f] second ➜ pet git:(testing) git commit --allow-empty -sam "third" [testing 7120047] third ➜ pet git:(testing) git --no-pager log --oneline -4 7120047 (HEAD -> testing) third feb9b4f second 8210c2d first 2422e70 (origin/master, master) update README.md # how to get this branching point (2422e70) from `testing` branch? # git rev-list --boundary branch1...branch2 | grep "^-" | cut -c2- ➜ pet git:(testing) git rev-list --boundary testing...master | grep "^-" | cut -c2- 2422e70001b80d186fdd1df1a9227dc3d8e0061e