$ git clone -n https://src.fedoraproject.org/rpms/n2n.git /var/lib/mock/f40-build-2012376-45785/root/chroot_tmpdir/scmroot/n2n
Cloning into '/var/lib/mock/f40-build-2012376-45785/root/chroot_tmpdir/scmroot/n2n'...
$ git fetch origin c6d0a1d030710dcdcf44539bc6cb8c5ffd672675:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/n2n
 * [new ref]         c6d0a1d030710dcdcf44539bc6cb8c5ffd672675 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at c6d0a1d Rebuilt for https://fedoraproject.org/wiki/Fedora_39_Mass_Rebuild