[CI][SYCL] Use github.sha instead of github.ref in sycl_*build_and*test.yml (#8913)

Author: aelovikov-intel

.github/workflows/sycl_linux_build_and_test.yml

@@ -82,7 +82,7 @@ jobs:
     - uses: ./actions/cached_checkout
       with:
         path: src
-        ref: ${{ inputs.build_ref || github.ref }}
+        ref: ${{ inputs.build_ref || github.sha }}
         cache_path: "/__w/repo_cache/"
     - name: Configure
       env:
@@ -220,7 +220,7 @@ jobs:
       with:
         persist-credentials: false
         path: llvm
-        ref: ${{ inputs.build_ref || github.ref }}
+        ref: ${{ inputs.build_ref || github.sha }}
     # TODO should this action be packed into container as well?
     - uses: ./llvm/devops/actions/e2e-tests
       name: Run SYCL End-to-End tests

.github/workflows/sycl_windows_build_and_test.yml

@@ -29,7 +29,7 @@ jobs:
     - uses: actions/checkout@v3
       with:
         path: src
-        ref: ${{ inputs.build_ref || github.ref }}
+        ref: ${{ inputs.build_ref || github.sha }}
         fetch-depth: 1
     - name: Register cleanup after job is finished
       uses: ./src/devops/actions/cleanup