Update a cloned repository to track all remote branches

update-branches.ps1

param (
    [Parameter(Mandatory=$true, HelpMessage="Location of the Git repository to update")]
    [string]$SourceLocation
)

# Test the source code location parameter
if ((Test-Path -Path $SourceLocation -PathType Container) -eq $false) {
    Write-Host "The specified source code location is not valid" -ForegroundColor Red
    exit 1
}

$SourceLocation = (Get-Item $SourceLocation).FullName

Push-Location $SourceLocation

$currentBranch = git rev-parse --abbrev-ref HEAD
$branches = git branch -a
$remotes = $branches | Where-Object {$_.Contains("remotes/") -and $_.Contains("HEAD") -eq $false}

foreach ($remote in $remotes) {
    $remote = [System.Collections.ArrayList]($remote.Trim().Split("/"))
    $remote.RemoveAt(0)
    $source = $remote[0]
    $branch = $remote[$remote.Count - 1]
    $remote = $remote -join '/'

    $test = git branch --list $branch
    if ($test -eq $null) {
        git branch --track $branch $remote
    }

    Write-Host "Updating $($branch) from $($source)" -ForegroundColor Green

    if ($branch.CompareTo($currentBranch) -eq 0) {
        git fetch $source $branch
    } else {
        git fetch $source $branch`:$branch
    }
}

Pop-Location

Created this so that you can have a local repo which shadows a remote, allowing all branches to be updated from the branch they're tracking.