$ git clone -n https://src.fedoraproject.org/rpms/seahorse-nautilus.git /var/lib/mock/f45-build-35788-699/root/chroot_tmpdir/scmroot/seahorse-nautilus
Cloning into '/var/lib/mock/f45-build-35788-699/root/chroot_tmpdir/scmroot/seahorse-nautilus'...
$ git fetch origin bcf02a27654fe9217c43aeb1cf583ab3ddd64e1a:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/seahorse-nautilus
 * [new ref]         bcf02a27654fe9217c43aeb1cf583ab3ddd64e1a -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at bcf02a2 Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild