For quick response, armed attack helicopters and / or jets.
There are three weapons that armed attack helicopters provide for use against golems; some of the comments up stream imply that small arms may or may not be effective. (This answer, mildly informed by some QRF operations I was involved with IRL, is aimed at helping you tell your story)
- Hellfire Missiles. They can have HE or anti armor head. (I'd go HE for flesh golems)
- 2.75 inch rockets(Hydra). In 2011, the effort to upgrade those to include a seaker head that followed laser designation was successful; APKWS. They are now in the inventory (in various flavors).
- 20mm or 30mm multi barreled machine gun. (Cobra or Apache)
Depending on the readiness level of the base in question, be it an Army National Guard base, an active Army base, or a Marine Corps base (like Camp Pendelton between LA and San Diego) the briefing, arming and transit time would be between 2-4 hours if the call for support comes during the day. If it's in the middle of the night or at 2:00 AM, a bit longer. That time span is subject to your authorial intent and desire. If someone says "US is under attack, I need ... X" the need for rapid response is understood at a place like Camp Pendelton (or similar military base).
Some useful jets: A-10s, F-16s, F-15Es, F-35s.
You could expect a response from Nellis Air Force Base in Nevada to arrive in about the same time if you (1) posited an alert state that got them armed quickly, and / or (2) if the units flying those aircraft were in a live fire exercise.
More useful Jets: F-18 (E/F) and / or F-35
From Fallon Nevada (Strike U), or from NAS Lemoore, you could posit a similar armed alert that, once someone called and said "Golems attacking, need armed jets over LA as soon as you can." With sufficient motivation and command requirement, 2-4 hours to get armed, briefed, and launched. MCAS Miramar likewise with armed air assets, as they have recently received F-35Cs.
In the time that it takes to get them briefed, armed, and enroute, in parallel (time-wise) someone local (National GUard or Air National Guard personnel) who is a FAC or a JFAC (Forward Air Controller) would need to be moving to be near the scene to get "eyes on target" for the air units. There are airborne FACs qualified in Marine squadrons. (I can't remember how USAF does airborne FAC at the moment) You could have an airborne FAC from Pendelton fullfil that role in your story.
All of the above aircraft have precision weapons: laser designated bombs and missiles. The 20mm and 30mm cannons are quite accurate, but the risk of collateral damage goes up a bit.
Air Assault in support
While all of that is going on, you can get some platoon strength Marine or Army units from the nearby bases armed with grenade launchers, .50 cal (Ma Deuce), and with anti-tank weapons. (Something like the AT-4). CH-53E or Osprey(V-22) can get them to the fight and arrive a little while after the attack helicopters go in. The problem there is to scramble a few platoons of appropriately armed infantry (heavy weapons platoon or Antitank platoon), get them to the airfield, get them briefed and armed (can be done in parallel) and then off they go. Air Assault is a thing that both the Army and Marines practice a lot.
That initial ground force will need to be reinforced rapidly. The transport aircraft can refuel at Pendelton/Army Base/etc (the USMC can hot-refuel with rotors turning) when they come to reload with the next platoon/company that got assembled, briefed and armed up. The size of the "Army" of golems informs just how dire the tactical situation is and how large of a response is needed. Battalion level? Brigage/Regiment level? Division? Corps? A Joint Task force HQ would probably fall in on the initial response/QRF force within 24-48 hours.
It takes time, but you can speed it up a little for narrative effect.
Heavier units; probably a day or so more before they can get to the fight.
If you want Bradleys / Strikers / Tanks, other Armored Fighting Vehicles, that will take a bit more time. The police have a collasal task of clearing the highways into LA from all of the people who are fleeing LA to allow the Army/Marines to roll in the heavy armor. I'd not have them arrive until the following day. And if you want to get your stubby pencil out, you can also force the issue of someone setting up FARPS (Feuling and arming points) so that the tanks and helicopters can stay in the fight ... not sure how many golems you have rolling in, and how long you envision the fight going on for.