$ git clone -n https://src.fedoraproject.org/rpms/libphonenumber.git /var/lib/mock/f41-build-side-1-3066213-38642/root/chroot_tmpdir/scmroot/libphonenumber
Cloning into '/var/lib/mock/f41-build-side-1-3066213-38642/root/chroot_tmpdir/scmroot/libphonenumber'...
$ git fetch origin 4d3f9501e03ffa3b24258b63910fc2b448d8ba30:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/libphonenumber
 * [new ref]         4d3f9501e03ffa3b24258b63910fc2b448d8ba30 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 4d3f950 Update to 8.13.45 upstream release