$ git clone -n https://src.fedoraproject.org/rpms/rust-probe.git /var/lib/mock/f38-build-side-43-rust-devel-1413896-31445/root/chroot_tmpdir/scmroot/rust-probe
Cloning into '/var/lib/mock/f38-build-side-43-rust-devel-1413896-31445/root/chroot_tmpdir/scmroot/rust-probe'...
$ git fetch origin 3f29fc73a65b4a2e577d2b212fedac63743f23d3:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/rust-probe
 * [new ref]         3f29fc73a65b4a2e577d2b212fedac63743f23d3 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 3f29fc7 Mark as incompatible with ppc64le and s390x for now, as inline assembly is not stable yet