When build from release tarball and where there is parent .git dir,
this situtaion will get wrong version info. (build with buildroot)
The systemd running show wrong version in dmesg log:
systemd[1]: systemd 2019.02-1086-gf5f17c4 running in system mode.
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Shoule be:
systemd[1]: systemd 241 running in system mode. (-PAM -AUDIT -SEL
^^^^^^^^^^^