CI: Fix Roll PyTorch CI failure at determining commit hash (#2796)

Signed-Off By: Vivek Khandelwal <[email protected]>

.github/workflows/RollPyTorch.yml

@@ -68,7 +68,7 @@ jobs:
         printf -- "-f https://download.pytorch.org/whl/nightly/cpu/torch_nightly.html\n--pre\ntorchvision==%s\n" "${VISION_RELEASE}" > torchvision-requirements.txt
 
         # Read the commit hash from the downloaded whl file without extracting it
-        PT_HASH=$(unzip -p torch-"${PT_RELEASE}"*.whl torch/version.py | grep git_version | awk '{ print $3 }' | tr -d "'")
+        PT_HASH=$(unzip -p torch-"${PT_RELEASE}"*.whl torch/version.py | grep git_version | tail -1 | awk '{ print $3 }' | tr -d "'")
         echo "Found torch commit hash ${PT_HASH}"
 
         PT_HASH_CHANGED=0