Gitlab::Git::Repository::NoRepository: 5:GetRepoPath: not a git repository: "/var/opt/gitlab/git-data/repositories/@hashed/d3/51/d351667...

https://new-sentry.gitlab.net/organizations/gitlab/issues/646428

GRPC::NotFound: 5:GetRepoPath: not a git repository: "/var/opt/gitlab/git-data/repositories/@hashed/d3/51/d3516674b5525ce5147b2a58dd54d6584d364d1903a15878a624c65007ff4f89.git".
  lib/gitlab/gitaly_client.rb:185:in `execute'
    stub(service, storage).__send__(rpc, request, kwargs) # rubocop:disable GitlabSecurity/PublicSend
  lib/gitlab/gitaly_client/call.rb:18:in `block in call'
    GitalyClient.execute(@storage, @service, @rpc, @request, remote_storage: @remote_storage, timeout: @timeout, &block)
  lib/gitlab/gitaly_client/call.rb:55:in `recording_request'
    yield
  lib/gitlab/gitaly_client/call.rb:17:in `call'
    response = recording_request do
  lib/gitlab/gitaly_client.rb:175:in `call'
    Gitlab::GitalyClient::Call.new(storage, service, rpc, request, remote_storage, timeout).call(&block)
...
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Gitlab::Git::Repository::NoRepository: 5:GetRepoPath: not a git repository: "/var/opt/gitlab/git-data/repositories/@hashed/d3/51/d3516674b5525ce5147b2a58dd54d6584d364d1903a15878a624c65007ff4f89.git".
  lib/gitlab/git/wraps_gitaly_errors.rb:9:in `rescue in wrapped_gitaly_errors'
    raise Gitlab::Git::Repository::NoRepository, e
  lib/gitlab/git/wraps_gitaly_errors.rb:6:in `wrapped_gitaly_errors'
    def wrapped_gitaly_errors(&block)
  lib/gitlab/git/repository.rb:732:in `delete_refs'
    wrapped_gitaly_errors do
  app/models/repository.rb:908:in `delete_refs'
    raw.delete_refs(...)
  app/models/merge_request.rb:1519:in `cleanup_refs'
    project.repository.delete_refs(*target_refs)
...
(87 additional frame(s) were not displayed)