CentOS 6.2 is used in this article, and the process of rebuilding curl and git is carried out.
The main reason is that the operating system is too old, and I want to directly build the latest version of git from source.

cat /etc/redhat-release
CentOS release 6.2 (Final)

But when executing the following command, an SSL connect error error occurred.

git clone https://github.com/git/git.git

Because of the old version of CentOS, the way the network provides..
yum update -y nss curl
The update method for is invalid,
So.. I re-Build curl myself.
First on another computer, clone, the latest version of curl.

git clone https://github.com/curl/curl

According to its instructions, check the GIT-INFO file, how to compile.
I execute

./buildconf
./configure
make

Just compiled curl smoothly. Then use make install to install directly.
After completion, retry the download of git repo (Note: In fact, you can go to release to download the released version)

[root@myserver src]# git clone https://github.com/git/git.git
Cloning into 'git'...
remote: Counting objects: 247464, done.
remote: Total 247464 (delta 0), reused 0 (delta 0), pack-reused 247463
Receiving objects: 100% (247464/247464), 90.42 MiB | 1.16 MiB/s, done.
Resolving deltas: 100% (182891/182891), done.
Checking connectivity... done.

Shunli cloned the source of git.
Enter the git repo folder.
According to the instructions in README.md, check the INSTALL file and how to install it.

$ make configure ;# as yourself
$ ./configure --prefix=/usr ;# as yourself
$ make all doc ;# as yourself
# make install install-doc install-html; # as root

Sure enough, step-by-step construction guarantees success. But I simply do the following actions. Hit ./configure without setting prefix.

make configure
./configure
make
make install

It's done, but I found that the suspected version is the rc1 version.

[root@myserver git]# which git
/usr/local/bin/git
[root@myserver git]# git --version
git version 2.18.0.rc1

Although it is the RC version, basically there will be no problems, it looks normal..:)

[root@myserver src]# git clone https://github.com/DevinY/dlaravel.git
Cloning into 'dlaravel'...
remote: Counting objects: 1456, done.
remote: Compressing objects: 100% (36/36), done.
remote: Total 1456 (delta 27), resumed 42 (delta 16), pack-reused 1398
Receiving objects: 100% (1456/1456), 3.03 MiB | 948.00 KiB/s, done.
Resolving deltas: 100% (866/866), done.

After thinking about it, I rebuilt version 2.17.1 again. This time I went to the release to download it through wget, unzip it and rebuild.

simply use,

./configure
make
make install

The final screen is as follows, and version 2.17.1 is installed.

 rm -f "$execdir/$p" && \
test -z "" && \
ln "$execdir/git-remote-http" "$execdir/$p" 2>/dev/null || \
ln -s "git-remote-http" "$execdir/$p" 2>/dev/null || \
cp "$execdir/git-remote-http" "$execdir/$p" || exit; \
done && \
./check_bindir "z$bindir" "z$execdir" "$bindir/git-add"
[root@myserver git-2.17.1]# which git
/usr/local/bin/git
[root@myserver git-2.17.1]# git --version
git version 2.17.1
[root@myserver git-2.17.1]#

The above is the process of updating git in the old version of CentOS 6.2 this time.