nodegit-checkout-tag.js

var {Checkout, Submodule, Repository} = require("nodegit");
Repository.open("/native-repo")
          .then(function(repository) {
            return repository.getTagByName("v1.0.8")
                             .then(function(result) { console.dir(result); return result; })
                             .then(function(tag) { console.dir([tag.targetId(), repository.defaultSignature, "Checkout: HEAD " + tag.targetId()]); return tag; })
                             .then(function(tag) { repository.setHeadDetached(tag.targetId(), repository.defaultSignature, "Checkout: HEAD " + tag.targetId()) })
          })
          .then(function() { console.log("done");})
          .done()