spindle/models: fix setting clone depth

Signed-off-by: Anirudh Oppiliappan <[e-mail]>

spindle/models/setup_steps.go

···
 	cloneDepth := 1
 	if twf.Clone.Depth > 1 {
 		cloneDepth = int(twf.Clone.Depth)
-		cloneCmd = append(cloneCmd, []string{"--depth", fmt.Sprintf("%d", cloneDepth)}...)
 	}
+	cloneCmd = append(cloneCmd, []string{"--depth", fmt.Sprintf("%d", cloneDepth)}...)
 
 	if twf.Clone.Submodules {
 		cloneCmd = append(cloneCmd, "--recursive")