Validate if commit exists

Question

How to validate whether the commit with given sha exists in current branch?

There are many ways to parse outputs, but I need optimal way which returns boolean (for u

Answer 1

git cat-file prints information about the objects in the repository. "-e" checks if the object is valid and exits with a 0 status and when invalid exists with a 1.

git cat-file -e 3d68db1028afe27a0055c2234f98fc945b1958f5
echo $?
1