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The bitcoin-explorer command bx fetch-header -t 1 fetches the first Bitcoin block and shows the block header.
If I check the "first" block header, where does "previous block hash" come from?

1
The bitcoin-explorer command bx fetch-header -t 1 fetches the first Bitcoin block and shows the block header.
If I check the "first" block header, where does "previous block hash" come from?

1
Found the solution, the command for the genesis block should be:
bx fetch-header -t 0
