[CmdletBinding(SupportsShouldProcess)]param(
    [Parameter(Mandatory)]
    [string]$LocalPath,
    [Parameter(Mandatory)]
    [string]$GitOrigin,
    [string]$Branch='HEAD'
)
$local:gitPath = Join-Path 'themes' 'plextheme' | Get-Path
function doGit { git "--git-dir=`"$(Join-Path $LocalPath '.git')`"" "--work-tree=`"$LocalPath`"" $args }
$local:savedErrorActionPreference = $ErrorActionPreference
$ErrorActionPreference = 'Stop'
$local:exists = Test-Path $LocalPath
try {
    if( $exists ) {
        # Update code from git repo
        Write-Verbose "Pulling from [$GitOrigin] into [$LocalPath] on branch/tag '$Branch'..."
        doGit fetch --quiet
    } else {
        git clone $GitOrigin $LocalPath
    }
    doGit checkout $Branch --quiet
    if( $exists ) {
        doGit status
    }
} catch {
    throw $_
} finally {
    $ErrorActionPreference = $savedErrorActionPreference
}