$ git clone -n https://src.fedoraproject.org/rpms/rust-nu-cmd-lang.git /var/lib/mock/f39-build-2263674-54523/root/chroot_tmpdir/scmroot/rust-nu-cmd-lang
Cloning into '/var/lib/mock/f39-build-2263674-54523/root/chroot_tmpdir/scmroot/rust-nu-cmd-lang'...
$ git fetch origin 9946485992f122019fdfc9f4340acf2ac693e19d:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/rust-nu-cmd-lang
 * [new ref]         9946485992f122019fdfc9f4340acf2ac693e19d -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 9946485 Update to 0.88.1