get-default-repo-tree.ps1

$ErrorActionPreference = "Stop"

$githubAuth = "get your own token"
$organization = "your org"
$repoName = "your repo"

$repo = Invoke-RestMethod -Method Get -Uri "https://api.github.com/repos/$organization/$repoName" -Headers @{ 
    Authorization = "bearer $githubAuth"
    Accept = "application/vnd.github.v3+json"
} -Body $body -UseBasicParsing

$mainBranchName = $repo.default_branch

$mainBranch = Invoke-RestMethod -Method Get -Uri "https://api.github.com/repos/$organization/$repoName/branches/$mainBranchName" -Headers @{ 
    Authorization = "bearer $githubAuth"
    Accept = "application/vnd.github.v3+json"
} -Body $body -UseBasicParsing

$trees = Invoke-RestMethod -Method Get -Uri "https://api.github.com/repos/$organization/$repoName/git/trees/$($mainBranch.commit.sha)?recursive=1" -Headers @{ 
    Authorization = "bearer $githubAuth"
    Accept = "application/vnd.github.v3+json"
} -Body $body -UseBasicParsing

$trees.truncated

$trees.tree