$ git clone -n https://src.fedoraproject.org/rpms/octave-quaternion.git /var/lib/mock/f45-build-20865-574/root/chroot_tmpdir/scmroot/octave-quaternion
Cloning into '/var/lib/mock/f45-build-20865-574/root/chroot_tmpdir/scmroot/octave-quaternion'...
$ git fetch origin 347422667033c5ba6e4d0ddb17bac64368eddd9b:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/octave-quaternion
 * [new ref]         347422667033c5ba6e4d0ddb17bac64368eddd9b -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 3474226 Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild