public void UpdateHead(Head head, Commit commit)
{
if (head.TargetType != Head.Target.Branch)
{
directory.ChangeHead(commit);
}
else
{
var branch = head.TargetBranch;
var newBranch = new Branch(commit, branch.Metadata, branch.Name);
directory.UpdateBranch(newBranch);
}
}
