$ git clone -n https://src.fedoraproject.org/rpms/cxxopts.git /var/lib/mock/f40-build-2433286-60694/root/chroot_tmpdir/scmroot/cxxopts
Cloning into '/var/lib/mock/f40-build-2433286-60694/root/chroot_tmpdir/scmroot/cxxopts'...
$ git fetch origin 191933cee942ff51a8747a5d4981eec0bac9ce78:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/cxxopts
 * [new ref]         191933cee942ff51a8747a5d4981eec0bac9ce78 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 191933c Update to 3.2.1