$ git clone -n https://src.fedoraproject.org/rpms/netsniff-ng.git /var/lib/mock/f41-build-843519-162049/root/chroot_tmpdir/scmroot/netsniff-ng
Cloning into '/var/lib/mock/f41-build-843519-162049/root/chroot_tmpdir/scmroot/netsniff-ng'...
$ git fetch origin d4905bc9fd9579bd0fdbc9cf9327202341d5d077:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/netsniff-ng
 * [new ref]         d4905bc9fd9579bd0fdbc9cf9327202341d5d077 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at d4905bc convert GPLv2 license to SPDX