:ref in the URL must be formatted as heads/<branch name> for branches and tags/<tag name> for tags. If the :ref doesn't match an existing ref, a 404 is returned.curl --location 'https://service1.exmaple.com/repos///git/ref/heads/feature-a'{
"ref": "refs/heads/featureA",
"node_id": "MDM6UmVmcmVmcy9oZWFkcy9mZWF0dXJlQQ==",
"url": "https://api.github.com/repos/octocat/Hello-World/git/refs/heads/featureA",
"object": {
"type": "commit",
"sha": "aa218f56b14c9653891f9e74264a383fa43fefbd",
"url": "https://api.github.com/repos/octocat/Hello-World/git/commits/aa218f56b14c9653891f9e74264a383fa43fefbd"
}
}