fix: clippy suggestions

Author: oahshtsua

src/commands/derive.rs

@@ -18,9 +18,9 @@ fn create_variant_initial_commit(
 
     let variant_head_oid = repo
         .commit(
-            Some(&ref_name),
-            &sig,
-            &sig,
+            Some(ref_name),
+            sig,
+            sig,
             "Variant initial commit\n",
             &tree,
             &[],
@@ -135,10 +135,10 @@ pub fn derive(repo: &Repository, name: &str, features: &[String]) -> Result<()>
         let commit = repo.find_commit(oid)?;
 
         let summary = commit.summary().context("Error extracting summary")?;
-        if let Some(feature) = extract_scope(summary) {
-            if !target_features.contains(feature) {
-                continue;
-            }
+        if let Some(feature) = extract_scope(summary)
+            && !target_features.contains(feature)
+        {
+            continue;
         }
 
         if commit.parent_count() == 0 {
@@ -191,7 +191,7 @@ pub fn derive(repo: &Repository, name: &str, features: &[String]) -> Result<()>
                 Some(&ref_name),
                 &sig,
                 &sig,
-                &commit_msg,
+                commit_msg,
                 &new_tree,
                 &[&variant_parent],
             )?;
@@ -204,7 +204,7 @@ pub fn derive(repo: &Repository, name: &str, features: &[String]) -> Result<()>
 
     repo.reference_symbolic(
         &var_ref_name,
-        &var_ref_target,
+        var_ref_target,
         false,
         "initialized new variant",
     )