$ git clone -n https://src.fedoraproject.org/rpms/rust-nu-system.git /var/lib/mock/f40-build-2487741-61651/root/chroot_tmpdir/scmroot/rust-nu-system
Cloning into '/var/lib/mock/f40-build-2487741-61651/root/chroot_tmpdir/scmroot/rust-nu-system'...
$ git fetch origin e37125a5172edfc7f95976ba93f2c237f7e1bde9:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/rust-nu-system
 * [new ref]         e37125a5172edfc7f95976ba93f2c237f7e1bde9 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at e37125a Rebuilt for https://fedoraproject.org/wiki/Fedora_40_Mass_Rebuild