diff --git a/api/v1alpha1/gitrepository_types.go b/api/v1alpha1/gitrepository_types.go
index cbf53f5a..09c72f36 100644
--- a/api/v1alpha1/gitrepository_types.go
+++ b/api/v1alpha1/gitrepository_types.go
@@ -22,13 +22,21 @@ import (
 
 // GitRepositorySpec defines the desired state of GitRepository
 type GitRepositorySpec struct {
-	// +kubebuilder:validation:MinLength=4
+	// +kubebuilder:validation:Pattern="^(http|https|ssh)://"
 
-	// The repository address
+	// The repository URL, can be a HTTP or SSH address.
 	Url string `json:"url"`
 
-	// The interval at which to check for repository updates
+	// The interval at which to check for repository updates.
 	Interval metav1.Duration `json:"interval"`
+
+	// The git branch to checkout, defaults to ('master').
+	// +optional
+	Branch string `json:"branch"`
+
+	// The git tag to checkout, takes precedence over branch.
+	// +optional
+	Tag string `json:"tag"`
 }
 
 // GitRepositoryStatus defines the observed state of GitRepository
diff --git a/config/crd/bases/sourcer.fluxcd.io_gitrepositories.yaml b/config/crd/bases/sourcer.fluxcd.io_gitrepositories.yaml
index db82e1c3..f83b0711 100644
--- a/config/crd/bases/sourcer.fluxcd.io_gitrepositories.yaml
+++ b/config/crd/bases/sourcer.fluxcd.io_gitrepositories.yaml
@@ -49,12 +49,18 @@ spec:
         spec:
           description: GitRepositorySpec defines the desired state of GitRepository
           properties:
+            branch:
+              description: The branch to checkout
+              type: string
             interval:
               description: The interval at which to check for repository updates
               type: string
+            tag:
+              description: The tag to checkout
+              type: string
             url:
               description: The repository address
-              minLength: 4
+              pattern: ^(http|https|ssh)://
               type: string
           required:
           - interval