adapt to changes in git-protocol (#450)

Author: Byron

git-repository/src/clone/fetch/util.rs

@@ -56,7 +56,9 @@ pub fn update_head(
             git_protocol::fetch::Ref::Direct { full_ref_name, object } if full_ref_name == "HEAD" => {
                 (Some(object), None)
             }
-            git_protocol::fetch::Ref::Unborn { target } => (None, Some(target)),
+            git_protocol::fetch::Ref::Unborn { full_ref_name, target } if full_ref_name == "HEAD" => {
+                (None, Some(target))
+            }
             _ => return None,
         })
     }) {

git-repository/src/remote/fetch.rs

@@ -54,8 +54,8 @@ impl Source {
         match self {
             Source::ObjectId(_) => None,
             Source::Ref(r) => match r {
-                git_protocol::fetch::Ref::Unborn { target: _ } => Some("HEAD".into()),
-                git_protocol::fetch::Ref::Symbolic { full_ref_name, .. }
+                git_protocol::fetch::Ref::Unborn { full_ref_name, .. }
+                | git_protocol::fetch::Ref::Symbolic { full_ref_name, .. }
                 | git_protocol::fetch::Ref::Direct { full_ref_name, .. }
                 | git_protocol::fetch::Ref::Peeled { full_ref_name, .. } => Some(full_ref_name.as_ref()),
             },