Update emscripten.yml

Author: mcbarton

.github/workflows/emscripten.yml

@@ -958,7 +958,7 @@ jobs:
         micromamba activate CppInterOp-wasm
         git clone https://github.com/compiler-research/xeus-cpp.git
         cd ./xeus-cpp
-        git reset --soft HEAD~
+        git reset --hard HEAD~
         mkdir build
         pushd build
         export CMAKE_PREFIX_PATH=${{ env.PREFIX }}
@@ -983,7 +983,7 @@ jobs:
         micromamba activate CppInterOp-wasm
         git clone https://github.com/compiler-research/xeus-cpp.git
         cd .\xeus-cpp
-        git reset --soft HEAD~
+        git reset --hard HEAD~
         mkdir build
         pushd build
         $env:CMAKE_PREFIX_PATH="${{ env.PREFIX }}"