$ git clone -n https://src.fedoraproject.org/rpms/rust-ndarray.git /var/lib/mock/f45-build-43342-802/root/chroot_tmpdir/scmroot/rust-ndarray
Cloning into '/var/lib/mock/f45-build-43342-802/root/chroot_tmpdir/scmroot/rust-ndarray'...
$ git fetch origin a619e855e2a5271c1ef416b515660ff3f714ae56:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/rust-ndarray
 * [new ref]         a619e855e2a5271c1ef416b515660ff3f714ae56 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at a619e85 Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild