👷 Fix dependabot workflow

Author: fonimus

.github/workflows/build-dependabot.yml

@@ -10,3 +10,4 @@ jobs:
     uses: fonimus/ssh-shell-spring-boot/.github/workflows/reusable-build.yml@main
     with:
       sonar_analysis: false
+      ref: ${{ github.event.pull_request.head.sha }}

.github/workflows/reusable-build.yml

@@ -3,6 +3,11 @@ name: Reusable Build
 on:
   workflow_call:
     inputs:
+      ref:
+        required: false
+        type: string
+        default: ''
+        description: Ref to checkout
       sonar_analysis:
         required: false
         type: boolean
@@ -20,6 +25,8 @@ jobs:
     runs-on: ubuntu-latest
     steps:
       - uses: actions/checkout@v2
+        with:
+          ref: ${{ inputs.ref }}
       - name: Set up JDK 11
         uses: actions/[email protected]
         with: