ci: Use ci-fairy to check for Signed-off-by

Signed-off-by: Jonas Ådahl <jadahl@gmail.com>

.gitlab-ci.yml

@@ -1,4 +1,4 @@
-.templates_sha: &template_sha bd8010dd0123d3f0dda4ef691078566af2842613 # see https://docs.gitlab.com/ee/ci/yaml/#includefile
+.templates_sha: &template_sha 290b79e0e78eab67a83766f4e9691be554fc4afd # see https://docs.gitlab.com/ee/ci/yaml/#includefile
 
 
 include:
@@ -6,9 +6,14 @@ include:
   - project: 'freedesktop/ci-templates'
     ref: *template_sha
     file: '/templates/debian.yml'
+  # ci-fairy template
+  - project: 'freedesktop/ci-templates'
+    ref: *template_sha
+    file: '/templates/ci-fairy.yml'
 
 
 stages:
+  - review
   - prep
   - build
 
@@ -32,6 +37,19 @@ variables:
     FDO_DISTRIBUTION_EXEC: $DEBIAN_EXEC
 
 
+check-commit:
+  extends:
+    - .fdo.ci-fairy
+  stage: review
+  script:
+    - ci-fairy check-commits --signed-off-by --junit-xml=results.xml
+  variables:
+    GIT_DEPTH: 100
+  artifacts:
+    reports:
+      junit: results.xml
+
+
 debian:buster@container-prep:
   extends:
     - .debian.buster