$ git clone -n https://src.fedoraproject.org/rpms/rust-state.git /var/lib/mock/f45-build-45136-821/root/chroot_tmpdir/scmroot/rust-state
Cloning into '/var/lib/mock/f45-build-45136-821/root/chroot_tmpdir/scmroot/rust-state'...
$ git fetch origin 6c53e3cd2a71e6161454933a4295e06226ebb6a9:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/rust-state
 * [new ref]         6c53e3cd2a71e6161454933a4295e06226ebb6a9 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 6c53e3c Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild