The current GitBash installs with the shortcut target:
%USERPROFILE%\AppData\Local\GitHub\GitHub.appref-ms --open-shell
The appref-ms file, is a sort of link variant and unsurprisingly, using it as a parameter to ConEmu task command, doesn't work.
To find out what is actually being invoked when when running Git Shell we use Process Explorer which shows a bash.exe process with the command line :
"%USERPROFILE%\AppData\Local\GitHub\PortableGit_da44d00daa738db527315557813e7b68709ed0a1\bin\bash.exe" --login -i
This looks similar to the standard Cygwin bash invocation, we create a Git task in ConEmu (Win-Alt-P) and use the invocation with additional parameters to ConEmu specifying a new console and a color scheme:
"%USERPROFILE%\AppData\Local\GitHub\PortableGit_da44d00daa738db527315557813e7b68709ed0a1\bin\bash.exe" --login -i -new_console:P:"^<Tomorrow Night Bright>^"
and that's it.
