Description of problem:
The 'docker version' command displays incorrect Git commit information because you have used %autosetup macro with '-S git' in the spec file lately.

Version-Release number of selected component (if applicable):
docker-1.10.3-46.el7.10.x86_64

How reproducible:
always

Steps to Reproduce:
1. yum install --enablerepo=rhel-7-server-extras-rpms docker
2. systemctl start docker.service
3. docker version

Actual results:
$ docker version
Client:
 Version:         1.10.3
 API version:     1.22
 Package version: docker-common-1.10.3-46.el7.10.x86_64
 Go version:      go1.6.2
 Git commit:      2a93377-unsupported
 Built:           Fri Jul 29 13:45:25 2016
 OS/Arch:         linux/amd64

Server:
 Version:         1.10.3
 API version:     1.22
 Package version: docker-common-1.10.3-46.el7.10.x86_64
 Go version:      go1.6.2
 Git commit:      2a93377-unsupported
 Built:           Fri Jul 29 13:45:25 2016
 OS/Arch:         linux/amd64

Expected results:
$ docker version
Client:
 Version:         1.10.3
 API version:     1.22
 Package version: docker-common-1.10.3-46.el7.10.x86_64
 Go version:      go1.6.2
 Git commit:      f9d4a2c/1.10.3
 Built:           Fri Jul 29 13:45:25 2016
 OS/Arch:         linux/amd64

Server:
 Version:         1.10.3
 API version:     1.22
 Package version: docker-common-1.10.3-46.el7.10.x86_64
 Go version:      go1.6.2
 Git commit:      f9d4a2c/1.10.3
 Built:           Fri Jul 29 13:45:25 2016
 OS/Arch:         linux/amd64


Additional info:
If you intend to use DOCKER_GITCOMMIT then you should not initialize git repository.

Please refer to
https://github.com/projectatomic/docker/blob/rhel7-1.10.3/hack/make.sh#L69-L80
https://github.com/docker/docker/blob/master/hack/make.sh#L81-L100