fco_preview() for PowerShell. git-goto-win32.ps1 is with cmd.exe weirdness in the preview. git-goto-all.ps1 is the platform independent version.

git-goto-all.ps1

# This version should work on every PowerShell supported OS
# Inspired by fco_preview() from https://github.com/junegunn/fzf/wiki/examples#git

$NEWLINE = [System.Environment]::Newline
$GIT_BRANCHES = $(git --no-pager branch --all --format="%(if)%(HEAD)%(then)%(else)%(if:equals=HEAD)%(refname:strip=3)%(then)%(else)%1B[0;34;1mbranch%09%1B[m%(refname:short)%(end)%(end)")
$GIT_TAGS = $(git --no-pager tag)
$ITEMS = @()

if (!$GIT_BRANCHES -and !$GIT_TAGS) {
    Write-Error "No git repository found"
    exit 1
}

if ($GIT_BRANCHES) {
    $ITEMS += [Array]::FindAll($GIT_BRANCHES.Split($NEWLINE), [Predicate[string]] { $args[0] -ne [string]::Empty }) 
}
if ($GIT_TAGS) {
    $ITEMS += [Array]::FindAll($GIT_TAGS.Split($NEWLINE), [Predicate[string]] { $args[0] -ne [string]::Empty })
}

$FZFINPUT = [string]::Join($NEWLINE, $ITEMS)
$CURRENT = git rev-parse --abbrev-ref HEAD
$SELECTION = $(Write-Output $FZFINPUT | fzf --no-multi --ansi --no-hscroll --layout=reverse-list --nth=2 --header="Current branch/tag: $CURRENT" --preview="echo '== Branch / Tag: {-1} ==' && git --no-pager log -150 --pretty=reference {-1}")
if ([string]::IsNullOrWhiteSpace($SELECTION)) {
    exit 0
}
$BRANCH_PATTERN = ($SELECTION | Select-String -Pattern '(branch)?\s*(origin/)?(.*)')
git checkout $BRANCH_PATTERN.Matches.Groups[3].Value

git-goto-win32.ps1

# Inspired by fco_preview() from https://github.com/junegunn/fzf/wiki/examples#git

$NEWLINE = [System.Environment]::Newline
$GIT_BRANCHES = $(git --no-pager branch --all --format="%(if)%(HEAD)%(then)%(else)%(if:equals=HEAD)%(refname:strip=3)%(then)%(else)%1B[0;34;1mbranch%09%1B[m%(refname:short)%(end)%(end)")
$GIT_TAGS = $(git --no-pager tag)
$ITEMS = @()

if (!$GIT_BRANCHES -and !$GIT_TAGS) {
    Write-Error "No git repository found"
    exit 1
}

if ($GIT_BRANCHES) {
    $ITEMS += [Array]::FindAll($GIT_BRANCHES.Split($NEWLINE), [Predicate[string]] { $args[0] -ne [string]::Empty }) 
}
if ($GIT_TAGS) {
    $ITEMS += [Array]::FindAll($GIT_TAGS.Split($NEWLINE), [Predicate[string]] { $args[0] -ne [string]::Empty })
}

$FZFINPUT = [string]::Join($NEWLINE, $ITEMS)
$CURRENT = git rev-parse --abbrev-ref HEAD
$SELECTION = $(Write-Output $FZFINPUT | fzf --no-multi --ansi --no-hscroll --layout=reverse-list --nth=2 --header="Current branch/tag: $CURRENT" --preview="echo  Branch / Tag: {-1}  & echo. && git --no-pager log -150 --pretty=reference {-1}")
if ([string]::IsNullOrWhiteSpace($SELECTION)) {
    exit 0
}
$BRANCH_PATTERN = ($SELECTION | Select-String -Pattern '(branch)?\s*(origin/)?(.*)')
git checkout $BRANCH_PATTERN.Matches.Groups[3].Value