$ git clone -n https://src.fedoraproject.org/rpms/rust-wax.git /var/lib/mock/f40-build-2216014-52474/root/chroot_tmpdir/scmroot/rust-wax
Cloning into '/var/lib/mock/f40-build-2216014-52474/root/chroot_tmpdir/scmroot/rust-wax'...
$ git fetch origin 3bf023481ba7eb50ec4f2eadc8ce6516c3fe464c:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/rust-wax
 * [new ref]         3bf023481ba7eb50ec4f2eadc8ce6516c3fe464c -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 3bf0234 Update to 0.6.0