Fixed the link to getgit script

Author: arisudesu

Install-or-update-inside-MSYS2,-Cygwin-or-Git-for-windows-itself.md

@@ -4,7 +4,7 @@ Instead of configuring and installing Git for Windows using `pacman`, this guide
 
 ## How to
 
-With the script `getgit` introduced by [git-for-windows/build-extra#261](https://github.com/git-for-windows/build-extra/pull/261), you can download and run the script or just run `curl https://raw.githubusercontent.com/git-for-windows/build-extra/HEAD/mingw-w64-git-extra/getgit | bash`.
+With the script `getgit` introduced by [git-for-windows/build-extra#261](https://github.com/git-for-windows/build-extra/pull/261), you can download and run the script or just run `curl https://raw.githubusercontent.com/git-for-windows/build-extra/HEAD/git-extra/getgit | bash`.
 
 The script would gather information about the current system ( *Msys / Cygwin* ), bitness, version of an already existed Git for Windows, version of the latest released Git for Windows... and then forge a proper download URL targeting a proper version of the `PortableGit` installer.
 With all the information prepared, the script would download the installer and unpack it to `/tmp`. After that, all the necessary files will be copied to a proper place inside the ( *Msys's / Cygwin's* ) file system without touching any existing **non-git-for-windows-exclusive** files.