To push a large repository to GitHub is’s one approach to do it step by step: Only some commits at a time.

Here is how I do it using Powershell:

$s = . git --no-pager log --all --no-abbrev-commit --pretty=format:%H,%S,%cI 

$s | % {
    $ps = $_.Split(",", [System.StringSplitOptions]::RemoveEmptyEntries)  

    $hash = $ps[0]
    $ref = $ps[1]
    $date = [datetime]::parse($ps[2])

    return (New-Object PSObject -Property @{
        Hash = $hash
        Ref = $ref
        Date = $date
    })
} | sort-object Date | where-object {$_.Ref -like "refs/heads/*" } | ForEach-Object {

    $ref = $_.Ref
    $date = $_.Date
    $hash = $_.Hash


    write-host "Branch: $ref  Date: $($date)"

    $outp = . git push --no-verify github "$($hash):$($ref)"  2>&1

    if( $lastexitcode -ne 0 -and ($null -eq ($outp | ? { $_ -like "*branch tip is behind*"}))) {
    }

    $outp | write-host
}

The name of the remote respository is “github”.

This approach pushes each commit of the local repository to remote repo. It starts with the first commit.