io redirection - exec git command refuses to redirected to file in Go

Question

I am trying to invoke a git log from go and redirect the output to a given file.

cmdArgs = []string{"log", "--numstat", "--reverse", fmt.Sprintf("%s..HEAD", "89c98f5ec48c8ac383ea9e27d792c3dc77fa6240"), `--pretty="format:=%P %H %an %ae %ad %at %s %b"`}

cmdArgs = append(cmdArgs, ">> "+workingDir+"/logs/"+repoName+".log && cat "+workingDir+"/logs/"+repoName+".log")

cmd := exec.Command("git", cmdArgs...)
cmd.Dir = workingDir + repoName

var out bytes.Buffer
var stderr bytes.Buffer
cmd.Stdout = &out
cmd.Stderr = &stderr
err := cmd.Run()
if err != nil {
    fmt.Println("git", strings.Join(cmdArgs, " "), "in", workingDir+repoName)
    fmt.Println(fmt.Sprint(err) + ": " + stderr.String())
    panic(err)
}

fails with

git log --numstat --reverse --pretty="format:=%P %H %an %ae %ad %at %s %b" 89c98f5ec48c8ac383ea9e27d792c3dc77fa6240..HEAD  > /someplace/xx-tmp.log && cat /someplace/xx-tmp.log in /someplace
exit status 128: fatal: ambiguous argument ' > /someplace/xx-tmp.log && cat /someplace/xx-tmp.log: unknown revision or path not in the working tree.
Use '--' to separate paths from revisions, like this:
'git <command> [<revision>...] -- [<file>...]'

Executing the command in bash directly poses no problem.

Answer 1

Waitting for answers