$ git clone -n https://src.fedoraproject.org/rpms/rust-io-close.git /var/lib/mock/f45-build-42619-795/root/chroot_tmpdir/scmroot/rust-io-close
Cloning into '/var/lib/mock/f45-build-42619-795/root/chroot_tmpdir/scmroot/rust-io-close'...
$ git fetch origin fc2655835e0c1356d1f0d04ef70dd990c6b67b36:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/rust-io-close
 * [new ref]         fc2655835e0c1356d1f0d04ef70dd990c6b67b36 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at fc26558 Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild