diff --git a/docs/src/docs/asciidoc/index.adoc b/docs/src/docs/asciidoc/index.adoc
index c449202..4ad5523 100644
--- a/docs/src/docs/asciidoc/index.adoc
+++ b/docs/src/docs/asciidoc/index.adoc
@@ -336,6 +336,40 @@ gitRepositories {
 }
 ----
 
+== Performing actions before the build is included
+
+It is possible to perform actions right after a project has been cloned and before it is included.
+This can be useful, for example, if the project needs to be analyzed in order to properly configure the included builds.
+
+The action will always be called, even if sources are already available locally.
+It is **not** recommended to mutate sources as part of this callback, since this will likely break updating the sources later.
+
+.Executing code before the build is included
+[source,groovy,role="multi-language-sample",subs="attributes+"]
+----
+gitRepositories {
+    include('my-project') {
+    // ...
+        codeReady { event ->
+            println("Project cloned in ${event.checkoutDirectory}")
+        }
+    }
+}
+----
+
+[source,kotlin,role="multi-language-sample",subs="attributes+"]
+----
+gitRepositories {
+    include("my-project") {
+        // ...
+        codeReady {
+            println("Project cloned in ${checkoutDirectory}")
+        }
+    }
+}
+----
+
+
 [[comparison]]
 == Comparison of solutions
 
diff --git a/plugin/src/functionalTest/groovy/me/champeau/gradle/igp/BasicFunctionalTest.groovy b/plugin/src/functionalTest/groovy/me/champeau/gradle/igp/BasicFunctionalTest.groovy
index d8cbdad..6ed3802 100644
--- a/plugin/src/functionalTest/groovy/me/champeau/gradle/igp/BasicFunctionalTest.groovy
+++ b/plugin/src/functionalTest/groovy/me/champeau/gradle/igp/BasicFunctionalTest.groovy
@@ -23,6 +23,8 @@ class BasicFunctionalTest extends AbstractFunctionalTest {
 \\--- com.acme.somelib:somelib1:0.0 -> project :testlib0
 '''
 
+        outputContains 'Code ready'
+
         where:
         useCommit << [false, true]
     }
diff --git a/plugin/src/main/java/me/champeau/gradle/igp/IncludedGitRepo.java b/plugin/src/main/java/me/champeau/gradle/igp/IncludedGitRepo.java
index 5dd8d75..942f333 100644
--- a/plugin/src/main/java/me/champeau/gradle/igp/IncludedGitRepo.java
+++ b/plugin/src/main/java/me/champeau/gradle/igp/IncludedGitRepo.java
@@ -21,6 +21,8 @@
 import org.gradle.api.initialization.ConfigurableIncludedBuild;
 import org.gradle.api.provider.Property;
 
+import java.io.File;
+
 /**
  * Configures an included Git repository.
  */
@@ -94,4 +96,35 @@ default void includeBuild(String relativePath) {
      * @param config the authentication configuration
      */
     void authentication(Action<? super Authentication> config);
+
+    /**
+     * Allows executing some code right after a repository has been checked out, typically
+     * before the directory is included in a composite build.
+     * @param configuration the configuration action
+     */
+    void codeReady(Action<? super CodeReadyEvent> configuration);
+
+    /**
+     * Base interface for events.
+     */
+    interface Event {
+        /**
+         * The git repository for which the event was called
+         * @return the git repository
+         */
+        IncludedGitRepo getIncludedGitRepo();
+    }
+
+    /**
+     * Event triggered when the code of an included repository
+     * is ready (e.g checked out). It is _not_ recommended to alter
+     * the contents of the directory as it will likely break updates.
+     */
+    interface CodeReadyEvent extends Event {
+        /**
+         * The directory where the project is checked out.
+         * @return the directory
+         */
+        File getCheckoutDirectory();
+    }
 }
diff --git a/plugin/src/main/java/me/champeau/gradle/igp/internal/DefaultIncludedGitRepo.java b/plugin/src/main/java/me/champeau/gradle/igp/internal/DefaultIncludedGitRepo.java
index ea536f7..14ab329 100644
--- a/plugin/src/main/java/me/champeau/gradle/igp/internal/DefaultIncludedGitRepo.java
+++ b/plugin/src/main/java/me/champeau/gradle/igp/internal/DefaultIncludedGitRepo.java
@@ -33,6 +33,7 @@ public abstract class DefaultIncludedGitRepo implements IncludedGitRepo {
     private final ObjectFactory objects;
     private final Action<ConfigurableIncludedBuild> rootSpec;
     private final List<IncludedBuild> includes = new ArrayList<>();
+    private final List<Action<? super CodeReadyEvent>> codeReadyEvents = new ArrayList<>();
     private DefaultAuthentication auth;
 
     @Inject
@@ -56,6 +57,11 @@ public void includeBuild(Action<? super ConfigurableIncludedBuild> spec) {
         });
     }
 
+    @Override
+    public void codeReady(Action<? super CodeReadyEvent> configuration) {
+        codeReadyEvents.add(configuration);
+    }
+
     /**
      * If this method is called, then the auto-include property will
      * automatically be set to false.
@@ -86,6 +92,9 @@ Optional<DefaultAuthentication> getAuth() {
     }
 
     void configure(Settings settings, File checkoutDirectory) {
+        if (!codeReadyEvents.isEmpty()) {
+            fireCodeReadyEvents(checkoutDirectory);
+        }
         if (getAutoInclude().get()) {
             settings.includeBuild(checkoutDirectory, rootSpec);
         } else {
@@ -97,6 +106,23 @@ void configure(Settings settings, File checkoutDirectory) {
         }
     }
 
+    private void fireCodeReadyEvents(File checkoutDirectory) {
+        CodeReadyEvent codeReadyEvent = new CodeReadyEvent() {
+            @Override
+            public IncludedGitRepo getIncludedGitRepo() {
+                return DefaultIncludedGitRepo.this;
+            }
+
+            @Override
+            public File getCheckoutDirectory() {
+                return checkoutDirectory;
+            }
+        };
+        for (Action<? super CodeReadyEvent> action : codeReadyEvents) {
+            action.execute(codeReadyEvent);
+        }
+    }
+
     private static class IncludedBuild {
         private final String directory;
         private final Action<? super ConfigurableIncludedBuild> spec;
diff --git a/samples/basic/groovy/settings.gradle b/samples/basic/groovy/settings.gradle
index a91feb3..b84076d 100644
--- a/samples/basic/groovy/settings.gradle
+++ b/samples/basic/groovy/settings.gradle
@@ -17,5 +17,9 @@ gitRepositories {
         if (gradle.startParameter.projectProperties.containsKey('checkoutDir')) {
             checkoutDirectory.set(file(gradle.startParameter.projectProperties.get('checkoutDir')))
         }
+        codeReady { event ->
+            println "Code ready"
+            println "Checkout directory: ${event.checkoutDirectory}"
+        }
     }
 }
diff --git a/samples/basic/kotlin/settings.gradle.kts b/samples/basic/kotlin/settings.gradle.kts
index 3e1c49e..e8efb4b 100644
--- a/samples/basic/kotlin/settings.gradle.kts
+++ b/samples/basic/kotlin/settings.gradle.kts
@@ -20,5 +20,9 @@ gitRepositories {
         if (gradle.startParameter.projectProperties.containsKey("checkoutDir")) {
             checkoutDirectory.set(file(gradle.startParameter.projectProperties.get("checkoutDir")!!))
         }
+        codeReady {
+            println("Code ready")
+            println("Checkout directory: ${checkoutDirectory}")
+        }
     }
 }