$ git clone -n https://src.fedoraproject.org/rpms/rust-nu-std.git /var/lib/mock/f40-build-2396215-60542/root/chroot_tmpdir/scmroot/rust-nu-std
Cloning into '/var/lib/mock/f40-build-2396215-60542/root/chroot_tmpdir/scmroot/rust-nu-std'...
$ git fetch origin 43c9c3a7d8b36d48cce65ff2c2ba0b0b7a0cec53:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/rust-nu-std
 * [new ref]         43c9c3a7d8b36d48cce65ff2c2ba0b0b7a0cec53 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 43c9c3a Rebuilt for https://fedoraproject.org/wiki/Fedora_40_Mass_Rebuild