Add callable workflow option

Author: adamiBs

.github/workflows/pre-merge.yml

@@ -4,6 +4,7 @@ on:
     branches:
       - master
       - release/*
+  workflow_call:
 
 jobs:
   build-and-test:
@@ -36,6 +37,8 @@ jobs:
     steps:
       - name: Checkout code
         uses: actions/checkout@v4
+        with:
+          ref: unstable
       - uses: ./.github/actions/build-and-tag-locally
         with:
           distribution: ${{ matrix.distribution }}