To bypass any geotargeting you can use a several techniques and test the results:
use google.com/ncr to go to any local google property without country redirect (ncr stands for no country redirect).
you can use the pws=0 parameter to disable personalized results (e.g google.com/#q=google&pws=0)
you can set another country geo location using the gl paramter (e.g google.com/#q=google&gl=us)
Using proxies (or VPN) is the best solution for geo targeting up to the city level but you can also use free extensions to Chrome or Firefox such as hola! or Google Global
using incognito or clear browsing data as mentioned above are not perfect solutions as Google keeps a copy of your search history on their servers, to see your history log in to your account and browse to: https://history.google.com/history/ this data is available to Google even if you are not logged in. Do all the experiment using an anonymous browser such as Tor or a browser where all history and browsing data was deleted and without logging in to your account.
just using the two parameters mentioned above should get you the same results from any location in the world - you can also run tests using Google ad preview tool found at:
Finally, you can set your location using Google's own search settings up to the street level. Search for something, click the wrench icon, choose location and set your preferred location.