$ git clone -n https://src.fedoraproject.org/rpms/rust-num-iter.git /var/lib/mock/f45-build-43452-803/root/chroot_tmpdir/scmroot/rust-num-iter
Cloning into '/var/lib/mock/f45-build-43452-803/root/chroot_tmpdir/scmroot/rust-num-iter'...
$ git fetch origin 1a25bd5a2548117dd14e1f9bc024444edf7477b4:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/rust-num-iter
 * [new ref]         1a25bd5a2548117dd14e1f9bc024444edf7477b4 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 1a25bd5 Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild