$ git clone -n https://src.fedoraproject.org/rpms/libphonenumber.git /var/lib/mock/f40-build-2297814-56497/root/chroot_tmpdir/scmroot/libphonenumber
Cloning into '/var/lib/mock/f40-build-2297814-56497/root/chroot_tmpdir/scmroot/libphonenumber'...
$ git fetch origin bfd07f9c349cddbd375a0fea8439462ba88c9406:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/libphonenumber
 * [new ref]         bfd07f9c349cddbd375a0fea8439462ba88c9406 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at bfd07f9 Always build as position-independent code (PIC)