Finally we have found decision how to "rename" column in SOQL without using standart Aggregate function that requires Group by clause in the end, and unfortunately doesn`t allow to export more that 2000 rows in query.

The best way is using Format(Field) Custom_Name.
It could be tricky way to use this with some dates values or e.t.c cause function changes format of values in field.

The name of Hero who advice it - Roman Bielei