fix the underlying issue

server/neptune/adhoc/adhocexecutionhelpers/adhoc_execution_params.go

@@ -4,6 +4,7 @@ import (
 	"context"
 
 	"github.com/pkg/errors"
+	"github.com/runatlantis/atlantis/server/models"
 	"github.com/runatlantis/atlantis/server/neptune/adhoc/adhocgithubhelpers"
 	"github.com/runatlantis/atlantis/server/neptune/gateway/config"
 	root_config "github.com/runatlantis/atlantis/server/neptune/gateway/config"
@@ -33,7 +34,21 @@ func ConstructAdhocExecParamsWithRootCfgBuilderAndRepoRetriever(ctx context.Cont
 		},
 	}
 
-	rootCfgs, err := rootCfgBuilder.Build(ctx, &root_config.RepoCommit{}, repo.Credentials.InstallationToken, opts)
+	rootCfgs, err := rootCfgBuilder.Build(ctx, &root_config.RepoCommit{
+		Repo: models.Repo{
+			FullName: repo.GetFullName(),
+			Owner:    repo.Owner,
+			Name:     repoName,
+			CloneURL: repo.URL,
+			VCSHost: models.VCSHost{
+				Hostname: "github.com",
+				Type:     models.Github,
+			},
+			DefaultBranch: repo.DefaultBranch,
+		},
+		Branch: repo.DefaultBranch,
+		Sha:    revision,
+	}, repo.Credentials.InstallationToken, opts)
 	if err != nil {
 		return AdhocTerraformWorkflowExecutionParams{}, errors.Wrap(err, "building root cfgs")
 	}

server/vcs/provider/github/repo_fetcher.go

@@ -72,9 +72,6 @@ func (g *RepoFetcher) Fetch(ctx context.Context, repo models.Repo, branch string
 }
 
 func (g *RepoFetcher) clone(ctx context.Context, repo models.Repo, branch string, sha string, options RepoFetcherOptions) (string, func(ctx context.Context, filePath string), error) {
-	// debug
-	options.SimplePath = false
-
 	destinationPath := g.generateDirPath(repo.Name)
 	// If simple path is enabled, we don't need a prefix and UUID
 	if options.SimplePath {