git: prevent Git CMD from picking up git.exe in the local directory

This is based on a proposal by Dahan Gong in
git-for-windows/git#1945: use DOSKEY to force
the intended `git.exe` to be used when a command line such as `git show
HEAD` is called.

Signed-off-by: Johannes Schindelin <johannes.schindelin@gmx.de>

Author: dscho

mingw-w64-git/PKGBUILD

@@ -62,7 +62,7 @@ sha256sums=('SKIP'
             '80b0b11efe5a2f9b4cd92f28c260d0b3aad8b809c34ed95237c59b73e08ade0b'
             '94eea1bc10e08fadda561301fc3ad02171043f318dd530aa1b9ef61decbe8485'
             'ee0ed30b2601413a6efcd15f236747404cd2d576dcfad77fb5b1700852cde857'
-            '83b766b3dd0c9fe50062041a2ab7d8a2b5f062d7278048085e78d7fbe9e5045c'
+            '780922d5f6eaec6cbdbe817d8be2285eceb7b6d80f45ea983cca5cbfcb8acbf5'
             '0726d386e98d703d5254458056e02824fb3de5602e55a31ec0cddf67c302c3a4'
             '0726d386e98d703d5254458056e02824fb3de5602e55a31ec0cddf67c302c3a4'
             'cbed8b133eb9eec9972f146be5c3ff49db29b2fff8ab9c87a6d0c646c08a5128'

mingw-w64-git/git-cmd.rc

@@ -1,6 +1,6 @@
 STRINGTABLE
 BEGIN
-	0 "MINIMAL_PATH=1 @@COMSPEC@@ /K"
+	0 "MINIMAL_PATH=1 @@COMSPEC@@ /K ""doskey git=@@EXEPATH@@\\cmd\\git.exe $*"""
 END
 
 "MAINICON" ICON "git-for-windows.ico"