$ git clone -n https://src.fedoraproject.org/rpms/libsmi.git /var/lib/mock/f40-build-2242202-53669/root/chroot_tmpdir/scmroot/libsmi
Cloning into '/var/lib/mock/f40-build-2242202-53669/root/chroot_tmpdir/scmroot/libsmi'...
$ git fetch origin e2ba2dc9ea86074f58973c2f65a6cc5f03c3032d:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/libsmi
 * [new ref]         e2ba2dc9ea86074f58973c2f65a6cc5f03c3032d -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at e2ba2dc update source code to latest available, clean-up this ancient thing