$ git clone -n https://src.fedoraproject.org/rpms/rust-nu-command.git /var/lib/mock/f41-build-side-1-3136891-39784/root/chroot_tmpdir/scmroot/rust-nu-command
Cloning into '/var/lib/mock/f41-build-side-1-3136891-39784/root/chroot_tmpdir/scmroot/rust-nu-command'...
$ git fetch origin 23927b2f4ab8a938aa34b4c40ea94a5f4202b9ca:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/rust-nu-command
 * [new ref]         23927b2f4ab8a938aa34b4c40ea94a5f4202b9ca -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 23927b2 Update to version 0.99.1