$ git clone -n https://src.fedoraproject.org/rpms/rust-navi.git /var/lib/mock/f40-build-2150579-50897/root/chroot_tmpdir/scmroot/rust-navi
Cloning into '/var/lib/mock/f40-build-2150579-50897/root/chroot_tmpdir/scmroot/rust-navi'...
$ git fetch origin 6a910c58264161eb3135d90a7d2c94fbea4d6dd1:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/rust-navi
 * [new ref]         6a910c58264161eb3135d90a7d2c94fbea4d6dd1 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 6a910c5 Regenerate with rust2rpm v24