$ git clone -n https://src.fedoraproject.org/rpms/rust-nu-command.git /var/lib/mock/f41-build-side-1-3007587-36769/root/chroot_tmpdir/scmroot/rust-nu-command
Cloning into '/var/lib/mock/f41-build-side-1-3007587-36769/root/chroot_tmpdir/scmroot/rust-nu-command'...
$ git fetch origin a4f1bb627caa62780f1c02761d8144e3faa123c3:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/rust-nu-command
 * [new ref]         a4f1bb627caa62780f1c02761d8144e3faa123c3 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at a4f1bb6 Update rust-brotli to 7.0 (correctly)