Use a temp directory to update chroots

[[ -t 1 ]] && set -x

cd /var/empty

tmpdir="$(mktemp -d)"

trap 0 rm -rf "$tmpdir"

cd "$tmpdir"

for rep in {extra,testing,staging,seblu}-x86_64 multilib{,-seblu,-testing,-staging}; do

	type -p $rep-build >/dev/null && $rep-build -c &>/dev/null