$ git clone -n https://src.fedoraproject.org/rpms/rust-nu-json.git /var/lib/mock/f39-build-1467225-33722/root/chroot_tmpdir/scmroot/rust-nu-json
Cloning into '/var/lib/mock/f39-build-1467225-33722/root/chroot_tmpdir/scmroot/rust-nu-json'...
$ git fetch origin ca1a20c23e135bd2e4e4d9f5a9a8cb5bda0fe50b:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/rust-nu-json
 * [new ref]         ca1a20c23e135bd2e4e4d9f5a9a8cb5bda0fe50b -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at ca1a20c Rebuilt for https://fedoraproject.org/wiki/Fedora_39_Mass_Rebuild