How to "revert" object along some axis? I can just scale the object passing its pivot, but then the scale value gets negative along that axis is that I don`t totally need. Are there any other ways to obtain it?
You can use the mirror transform to 'revert' your object.
And if you don't like negative scale, just apply the scale.  

Mirror object: Object > Mirror
Apply Scale: Object > Apply > Scale  

How to mirror an object and apply scale.


Note:
Applying negative scale can flip your normals orientation.
Check your normals after that, so they're not inverted.