add revParse after code review

Author: jonatan5524

repo_blob.go

@@ -6,7 +6,12 @@ package git
 
 // CatFileBlob returns the blob corresponding to the given revision of the repository.
 func (repo *Repository) CatFileBlob(rev string) (*Blob, error) {
-typ, err := repo.CatFileType(rev)
+revHash, err := r.RevParse(rev, RevParseOptions{Timeout: opt.Timeout}) //nolint
+if err != nil {
+return nil, err
+}
+
+typ, err := repo.CatFileType(revHash)
 if err != nil {
 return nil, err
 }