$ git clone -n https://src.fedoraproject.org/rpms/rust-uu_env.git /var/lib/mock/f40-build-774045-127569/root/chroot_tmpdir/scmroot/rust-uu_env
Cloning into '/var/lib/mock/f40-build-774045-127569/root/chroot_tmpdir/scmroot/rust-uu_env'...
$ git fetch origin 5df1ef2482b1bc9524819fa45a17aeb5247067cc:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/rust-uu_env
 * [new ref]         5df1ef2482b1bc9524819fa45a17aeb5247067cc -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 5df1ef2 Initial package (rhbz#2257520)