$ git clone -n https://src.fedoraproject.org/rpms/octave-optim.git /var/lib/mock/f45-build-20850-574/root/chroot_tmpdir/scmroot/octave-optim
Cloning into '/var/lib/mock/f45-build-20850-574/root/chroot_tmpdir/scmroot/octave-optim'...
$ git fetch origin 9fb0b87bad4ed2f10d1b50aad615cba1e77421d7:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/octave-optim
 * [new ref]         9fb0b87bad4ed2f10d1b50aad615cba1e77421d7 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 9fb0b87 Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild