Avoid querying for OCI tags can explicit version provided in chart dependencies

Signed-off-by: Andrew Block <andy.block@gmail.com>

internal/resolver/resolver.go

@@ -135,6 +135,19 @@ func (r *Resolver) Resolve(reqs []*chart.Dependency, repoNames map[string]string
 			found = false
 		} else {
 			version = d.Version
+
+			// Check to see if an explicit version has been provided
+			_, err := semver.NewVersion(version)
+
+			// Use an explicit version, otherwise search for tags
+			if err == nil {
+				vs = []*repo.ChartVersion{{
+					Metadata: &chart.Metadata{
+						Version: version,
+					},
+				}}
+
+			} else {
 				// Retrieve list of tags for repository
 				ref := fmt.Sprintf("%s/%s", strings.TrimPrefix(d.Repository, fmt.Sprintf("%s://", registry.OCIScheme)), d.Name)
 				tags, err := r.registryClient.Tags(ref)
@@ -153,6 +166,7 @@ func (r *Resolver) Resolve(reqs []*chart.Dependency, repoNames map[string]string
 					vs[ti] = version
 				}
 			}
+		}
 
 		locked[i] = &chart.Dependency{
 			Name:       d.Name,