nodegit-push-new-branch.ts

import * as Git from "nodegit";

const signature = Git.Signature.create("Foo bar", "foo@bar.com", 123456789, 60); // http://www.nodegit.org/api/signature/

const files: string[] = [path.resolve(__dirname, "./tmp/xxxx/file1.ts"), path.resolve(__dirname, "./tmp/xxxx/file2.ts")];

// open repository - maybe not necessary, because you already have a reference
//let repo = await Git.Repository.open(path.resolve(__dirname, "./tmp/xxxx/.git"));

// Create a new branch on head
let commit = await repo.getHeadCommit();
await repo.createBranch("new-branch-name", commit, true); // http://www.nodegit.org/api/repository/#createBranch

// commit
await repo.createCommitOnHead(files, signature, signature, "commit message");

// get the remote we want to push to - maybe not necessary, because you already have a reference
//let remote = Git.Remote.lookup(repo, "origin")

// push
await remote.push(["refs/heads/master:refs/heads/master"]);