Trigger IGM Build with corresponding branch name

.gitlab-ci.yml

@@ -42,4 +42,8 @@ CoMISo-VS2017-Qt-5.10.1-x64:
 trigger_build:
   stage: deploy
   script:
-    - "curl -X POST -F token=e32246977fc2f0983bd1994162b407 -F ref=master https://www.graphics.rwth-aachen.de:9000/api/v3/projects/682/trigger/builds"
\ No newline at end of file
+    - "curl -X POST \
+       -F token=e32246977fc2f0983bd1994162b407 \
+       -F ref=master \
+       --form variables[BRANCH]=${CI_COMMIT_REF_NAME} \
+       https://www.graphics.rwth-aachen.de:9000/api/v3/projects/682/trigger/builds"
\ No newline at end of file