Simplify git.exec implementation using spawn
Simplify git.exec implementation using spawn

oouyang/gh,tomzx/gh,oouyang/gh,modulexcite/gh,dustinryerson/gh,tomzx/gh,TomzxForks/gh,henvic/gh,TomzxForks/gh,dustinryerson/gh,modulexcite/gh,henvic/gh