From 47d7f467d9a8c28fb234db8af90bb342d3a15e6c Mon Sep 17 00:00:00 2001
From: Filip Navara <navara@emclient.com>
Date: Fri, 11 Jun 2021 11:02:15 +0200
Subject: [PATCH] Fix resolving HEAD reference if it's a packed ref

---
 src/NerdBank.GitVersioning/ManagedGit/GitRepository.cs | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/src/NerdBank.GitVersioning/ManagedGit/GitRepository.cs b/src/NerdBank.GitVersioning/ManagedGit/GitRepository.cs
index 40cfc644..1d3b78b2 100644
--- a/src/NerdBank.GitVersioning/ManagedGit/GitRepository.cs
+++ b/src/NerdBank.GitVersioning/ManagedGit/GitRepository.cs
@@ -616,7 +616,9 @@ private GitObjectId ResolveReference(object reference)
             {
                 if (!FileHelpers.TryOpen(Path.Combine(this.CommonDirectory, (string)reference), out FileStream? stream))
                 {
-                    return GitObjectId.Empty;
+                    // HEAD can point to a reference that's in the packed references and needs
+                    // a full resolution.
+                    return Lookup((string)reference) ?? GitObjectId.Empty;
                 }
 
                 using (stream)