$ git clone -n https://src.fedoraproject.org/rpms/dmtx-utils.git /var/lib/mock/f40-build-750663-115155/root/chroot_tmpdir/scmroot/dmtx-utils
Cloning into '/var/lib/mock/f40-build-750663-115155/root/chroot_tmpdir/scmroot/dmtx-utils'...
$ git fetch origin 6dcfc9bc414a51eb92fd5c6cf9056f28dd287eda:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/dmtx-utils
 * [new ref]         6dcfc9bc414a51eb92fd5c6cf9056f28dd287eda -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 6dcfc9b - fix buffer overflow (rhbz#2228923)