Finding what branch a Git commit came from

Question

Is there a way to find out what branch a commit comes from given its SHA-1 hash value?

Bonus points if you can tell me how to accomplish this using Ruby Grit.

Answer 1

For example, to find that c0118fa commit came from redesign_interactions:

* ccfd449 (HEAD -> develop) Require to return undef if no digits found
*   93dd5ff Merge pull request #4 from KES777/clean_api
|\
| * 39d82d1 Fix tc0118faests for debugging debugger internals
| * ed67179 Move &push_frame out of core
| * 2fd84b5 Do not lose info about call point
| * 3ab09a2 Improve debugger output: Show info about emitted events
| *   a435005 Merge branch 'redesign_interactions' into clean_api
| |\
| | * a06cc29 Code comments
| | * d5d6266 Remove copy/paste code
| | * c0118fa Allow command to choose how continue interaction
| | * 19cb534 Emit &interact event

You should run:

git log c0118fa..HEAD --ancestry-path --merges

And scroll down to find last merge commit. Which is:

commit a435005445a6752dfe788b8d994e155b3cd9778f
Merge: 0953cac a06cc29
Author: Eugen Konkov
Date:   Sat Oct 1 00:54:18 2016 +0300

    Merge branch 'redesign_interactions' into clean_api

Update

Or just one command:

git log c0118fa..HEAD --ancestry-path --merges --oneline --color | tail -n 1