How can I determine if a given git hash exists on a given branch?

Question

Background: I use an automated build system which takes a git hash as input, as well as the name of the branch on which that hash exists, and builds it. However, the build syst

Answer 1

You can ask git branch directly which branches contain the commit in question:

% git branch -a --contains 4f08c85ad
* master
  remotes/origin/bug_872
  remotes/origin/bug_898
  remotes/origin/master