diff --git a/src/setup/runnable.rs b/src/setup/runnable.rs
index 5c3a1c3..add3f49 100644
--- a/src/setup/runnable.rs
+++ b/src/setup/runnable.rs
@@ -32,6 +32,7 @@ where
 
 macro_rules! runnable_for_tuple {
   ( $($name:ident)* ) => (
+    #[allow(clippy::let_unit_value)]
     #[async_trait(?Send)]
     #[allow(non_snake_case)]
     impl<$($name: Symbol + Debug,)*> Runnable for ($($name,)*) {
@@ -117,7 +118,7 @@ mod test {
     async fn run_symbol<S: Symbol + Debug, L: Logger>(
       &self,
       symbol: &S,
-      logger: &L,
+      _logger: &L,
       force: bool,
     ) -> Result<bool, Box<dyn Error>> {
       let run = force || !symbol.target_reached().await?;
diff --git a/src/setup/setup.rs b/src/setup/setup.rs
index 4efd0ab..842152b 100644
--- a/src/setup/setup.rs
+++ b/src/setup/setup.rs
@@ -201,7 +201,7 @@ mod test {
     async fn run_symbol<S: Symbol + Debug, L: Logger>(
       &self,
       symbol: &S,
-      logger: &L,
+      _logger: &L,
       force: bool,
     ) -> Result<bool, Box<dyn Error>> {
       let run = force || !symbol.target_reached().await?;
@@ -239,7 +239,7 @@ mod test {
   #[derive(Clone)]
   struct Artifacts;
   impl<V> FromArtifact<TestResource<V>> for Artifacts {
-    fn from_artifact(from: ()) -> Self {
+    fn from_artifact(_from: ()) -> Self {
       Self
     }
     fn into_artifact(self) -> () {
diff --git a/src/symbols/git/checkout.rs b/src/symbols/git/checkout.rs
index e2ad4a5..14593ba 100644
--- a/src/symbols/git/checkout.rs
+++ b/src/symbols/git/checkout.rs
@@ -63,7 +63,12 @@ impl<C: CommandRunner, _C: Borrow<C>, P: AsRef<Path>, S: AsRef<str>, B: AsRef<st
   }
 
   async fn execute(&self) -> Result<(), Box<dyn Error>> {
-    if !self.target.as_ref().exists() {
+    if self.target.as_ref().exists() {
+      self
+        .run_git(&["fetch", self.source.as_ref(), self.branch.as_ref()])
+        .await?;
+      self.run_git(&["merge", "FETCH_HEAD"]).await?;
+    } else {
       self
         .command_runner
         .borrow()
@@ -80,11 +85,6 @@ impl<C: CommandRunner, _C: Borrow<C>, P: AsRef<Path>, S: AsRef<str>, B: AsRef<st
           ],
         )
         .await?;
-    } else {
-      self
-        .run_git(&["fetch", self.source.as_ref(), self.branch.as_ref()])
-        .await?;
-      self.run_git(&["merge", "FETCH_HEAD"]).await?;
     }
     Ok(())
   }
diff --git a/src/to_artifact.rs b/src/to_artifact.rs
index e158f07..e45cda9 100644
--- a/src/to_artifact.rs
+++ b/src/to_artifact.rs
@@ -17,6 +17,8 @@ macro_rules! to_artifact {
 for_each_tuple!(to_artifact);
 
 impl<T: Resource> ToArtifact for Option<T> {
+  // FIXME: https://github.com/rust-lang/rust-clippy/issues/2843
+  #![allow(clippy::use_self)]
   type Artifact = Option<T::Artifact>;
 }