Tomado de
http://www.how-to-linux.com/es/2009/01/install-git-161-on-centos-52/
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Instalar las dependencias

yum install gettext-devel expatriados-devel curl-devel zlib-devel openssl-devel

Obtener el código fuente de GIT

wget http://kernel.org/pub/software/scm/git/git-1.6.1.tar.gz

GIT descomprimir el código fuente

tar xvfz git-1.6.1.tar.gz

Instale

cd git-1.6.1.tar.gz

./configure --prefix=/usr
make
make install install-doc install-html