$ git clone -n https://src.fedoraproject.org/rpms/rust-ivf.git /var/lib/mock/f45-build-42757-796/root/chroot_tmpdir/scmroot/rust-ivf
Cloning into '/var/lib/mock/f45-build-42757-796/root/chroot_tmpdir/scmroot/rust-ivf'...
$ git fetch origin 67f8a61f38c583beee16eca45766072b915dcb49:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/rust-ivf
 * [new ref]         67f8a61f38c583beee16eca45766072b915dcb49 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 67f8a61 Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild