$ git clone -n https://src.fedoraproject.org/rpms/rust-wayland-protocols.git /var/lib/mock/f40-build-2251397-54130/root/chroot_tmpdir/scmroot/rust-wayland-protocols
Cloning into '/var/lib/mock/f40-build-2251397-54130/root/chroot_tmpdir/scmroot/rust-wayland-protocols'...
$ git fetch origin 6fa85adcc3bdaa1639f6fe77e013463a07cf73d0:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/rust-wayland-protocols
 * [new ref]         6fa85adcc3bdaa1639f6fe77e013463a07cf73d0 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 6fa85ad Update to 0.31.0 (rhbz#2156605)