$ git clone -n https://src.fedoraproject.org/rpms/masscan.git /var/lib/mock/f45-build-18036-507/root/chroot_tmpdir/scmroot/masscan
Cloning into '/var/lib/mock/f45-build-18036-507/root/chroot_tmpdir/scmroot/masscan'...
$ git fetch origin 39da488afeb5c66fd697762bf5f29be431eee4aa:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/masscan
 * [new ref]         39da488afeb5c66fd697762bf5f29be431eee4aa -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 39da488 Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild