$ git clone -n https://src.fedoraproject.org/rpms/octave-iso2mesh.git /var/lib/mock/f45-build-20860-574/root/chroot_tmpdir/scmroot/octave-iso2mesh
Cloning into '/var/lib/mock/f45-build-20860-574/root/chroot_tmpdir/scmroot/octave-iso2mesh'...
$ git fetch origin 453f5c3b195f12c8aaf0217185fdf7813554373e:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/octave-iso2mesh
 * [new ref]         453f5c3b195f12c8aaf0217185fdf7813554373e -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 453f5c3 Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild