$ git clone -n https://src.fedoraproject.org/rpms/rust-nu-protocol.git /var/lib/mock/f39-build-1841968-41998/root/chroot_tmpdir/scmroot/rust-nu-protocol
Cloning into '/var/lib/mock/f39-build-1841968-41998/root/chroot_tmpdir/scmroot/rust-nu-protocol'...
$ git fetch origin 28b5a945014a01f01979892a12d2761fc9a64d5c:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/rust-nu-protocol
 * [new ref]         28b5a945014a01f01979892a12d2761fc9a64d5c -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 28b5a94 Update to 0.86.0