Merge branch 'cherry-pick-08ff978d-21.9' into '21.9'

Sweeping !32277 from master to 21.9.
ATLINFR-3506: Make sure atlasexternals build is done from correct repo

See merge request atlas/athena!32516

Build/AtlasBuildScripts/checkout_atlasexternals.sh

@@ -123,6 +123,20 @@ else
     echo "${SOURCEDIR} already exists -> assume previous checkout"
 fi
 
+# check whether the source directory points to the right repository
+RECLONE=false
+pushd ${SOURCEDIR}
+SOURCEURL=$(git remote get-url origin)
+if [ "${SOURCEURL}" != "${EXTERNALSURL}" ] ; then
+    echo "${SOURCEURL} wasn't cloned from ${EXTERNALSURL}, deleting"
+    RECLONE=true
+fi
+popd
+if [ $RECLONE = true ] ; then
+    rm -rf ${SOURCEDIR}
+    _retry_ git clone ${EXTERNALSURL} ${SOURCEDIR}
+fi
+
 # Get the appropriate version of it:
 cd ${SOURCEDIR}
 _retry_ git fetch --prune origin