$ git clone -n https://src.fedoraproject.org/rpms/rust-wayland-scanner.git /var/lib/mock/f39-build-2336210-59417/root/chroot_tmpdir/scmroot/rust-wayland-scanner
Cloning into '/var/lib/mock/f39-build-2336210-59417/root/chroot_tmpdir/scmroot/rust-wayland-scanner'...
$ git fetch origin 15a5a2013d2d2bf05ba8dbdea325f0d08a917819:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/rust-wayland-scanner
 * [new ref]         15a5a2013d2d2bf05ba8dbdea325f0d08a917819 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 15a5a20 Update to 0.31.0 (rhbz#2156606)