Building a 700c bike. Hub sizes
As long as the rim is 700c, any hubs with the thru axle dimensions you mentioned will work.


  Fork size is 100x15 with thru axle. Rear drops size 142мм x 12мм thru axle also. So it means i need any hubs which will fit these sizes? Because i know that these standarts are mostly for mountain bikes, and know nothing about how they fit the 700c wheels.


This is actually not quite true. 142x12mm is a common spec for the rear hub on current drop bar bikes with disc brakes. The vast majority of these bikes have thru axles. I think that many, possibly the majority, of drop bar bikes may have 100x12mm thru axles in the front, but 100x15 isn't unheard of.

Right now, I believe Boost spacing (i.e. 110x15mm front, 148x12mm rear) characterizes mountain bikes. I have no idea if drop bar bikes will adopt this spacing. Boost spacing improves the bracing angle of the hubs. It will increase wheel stiffness and strength. I'm a very light road and gravel rider, and I don't ride MTBs, so I have no idea if this performance gain is actually meaningful on MTBs. I have no idea if it will produce a meaningful performance gain for drop bar bikes, either.