To wholeheartedly commit to something and disregard everything but your focus [closed]

go hell-for-leather [/ hell for leather] [after something]

Merriam-Webster defines the adverb in terms of the adjective:

hell-for-leather adjective ... 2.2

marked by determined recklessness, great speed, or lack of restraint

a cocky, hell-for-leather fighting man — H. H. Martin

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hell-for-leather [adv]

in a hell-for-leather manner

rode hell-for-leather down the trail

another example:

Rather than building an early childhood system fit for purpose, based on democratic deliberation of alternatives, New Labour went hell for leather after expansion and opted for a strategy that was basically more of the same.

'For a new public early childhood education' by Peter Moss, Emeritus Professor, UCL Institute of Education.