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 rev-list branch-youre-interested-in | grep -q sha-youre-interested-in

You can use the exit code from grep in conditionals.

For the current branch,

 git rev-list HEAD | grep -q sha-youre-interested-in