$ git clone -n https://src.fedoraproject.org/rpms/cxxopts.git /var/lib/mock/f38-build-711000-93650/root/chroot_tmpdir/scmroot/cxxopts
Cloning into '/var/lib/mock/f38-build-711000-93650/root/chroot_tmpdir/scmroot/cxxopts'...
$ git fetch origin c884f98a27fabaaaa539e2f4adf0c13b7f577b2d:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/cxxopts
 * [new ref]         c884f98a27fabaaaa539e2f4adf0c13b7f577b2d -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at c884f98 Updated to version 3.1.1.