$ git clone -n https://src.fedoraproject.org/rpms/iscan-firmware.git /var/lib/mock/f45-build-14241-458/root/chroot_tmpdir/scmroot/iscan-firmware
Cloning into '/var/lib/mock/f45-build-14241-458/root/chroot_tmpdir/scmroot/iscan-firmware'...
$ git fetch origin 27cc95f9e76460dc366fa459e7286bfd80070dae:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/iscan-firmware
 * [new ref]         27cc95f9e76460dc366fa459e7286bfd80070dae -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 27cc95f Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild