remove unshallow as it does not work with current clone strat

# the United Nations Convention on Contracts on the International Sales of Goods.

# fetch all needed branches

# we need a full repo here to always be sure we get enough commits so the commits_behind_count thingy below works (only relevant for switching back to fetch GIT_STRATEGY)

git fetch --unshallow

git fetch origin "$CI_MERGE_REQUEST_TARGET_BRANCH_NAME"

git fetch origin ivas-float-update

float_ref_branchname=$(${CI_PROJECT_DIR}/ivas-codec-ci/snippets/basop/get-float-ref-branch-name.sh $CI_MERGE_REQUEST_SOURCE_BRANCH_NAME)