$ git clone -n https://src.fedoraproject.org/rpms/rust-uu_sort.git /var/lib/mock/f40-build-781144-131428/root/chroot_tmpdir/scmroot/rust-uu_sort
Cloning into '/var/lib/mock/f40-build-781144-131428/root/chroot_tmpdir/scmroot/rust-uu_sort'...
$ git fetch origin f73e49539ebc197ebce58d01ea4766924664c1ee:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/rust-uu_sort
 * [new ref]         f73e49539ebc197ebce58d01ea4766924664c1ee -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at f73e495 Initial package (rhbz#2258191)