Deleted tags show up in the list

[gauravsaxenais]

Reproduction steps

1. Add a new tag in github repository online (www.github.com).
2. Run .Net core Controller.
3. Added tag show up in the Api.
4. Delete a tag in github repository online.
5. Run controller and API.
6. Deleted tag show up in API Controller.

7. _repository = new Repository("localfolderpath"); var network = _repository.Network.Remotes.First(); var refSpecs = new List() { network.FetchRefSpecs.First().Specification }; var fetchOptions = new FetchOptions { TagFetchMode = TagFetchMode.All }; fetchOptions.CredentialsProvider = (_url, _user, _cred) => new DefaultCredentials(); fetchOptions.CredentialsProvider += (_url, _user, _cred) => _userNamePasswordCredentials;

   Commands.Pull(_repository, new Signature(Guid.NewGuid().ToString(), Guid.NewGuid().ToString(), DateTime.Now), new PullOptions()
   {
       FetchOptions = fetchOptions,
       MergeOptions = new MergeOptions()
       {
           MergeFileFavor = MergeFileFavor.Theirs,
           CommitOnSuccess = true
       }
   });
   
   foreach (Remote remote in _repository.Network.Remotes)
   {
       Commands.Fetch(_repository, remote.Name, new string[0], fetchOptions, null);
       _repository.Network.Fetch(remote.Name, remote.FetchRefSpecs.Select(r => r.Specification), fetchOptions);
   }

Expected behavior

1. Deleted tags shouldn't come up when using _repository.Tags

   Actual behavior

2. Deleted tags come up in _repository.Tags

   Version of LibGit2Sharp (release number or SHA1)

   Libgit2Sharp 0.26.2

   Operating system(s) tested; .NET runtime tested

   .Net Core 3.5, Microsoft Visual Studio Professional 2019 Version 16.9.0, .Net Framework 4.7.03190, Microsoft windows 10 pro.