GIT: How to get the name of the branch being merged?

Question

linux

Hello everyone, I am writing a small set of hooks for the git and I ran into the following problem: how to correctly get the name of the merged branch during the merge?
This case is necessary for the prepare-commit-msg hook.
Of course, you can parse .git/MERGE_MSG, but this is somehow not right or something)) If the default message is changed by someone, the script will not work correctly.
Actually a question: how on the basis of .git/MERGE_HEAD to receive a name of a branch to which this business belongs? Basically the branch I'm trying to merge?

Answer 1

Found the solution if anyone needs it:
git name-rev --name-only MERGE_HEAD