Description:
Below errors appear when do S2I build:
I0729 23:29:29.698613       1 clone.go:27] Cloning into /tmp/sti962730161/upload/src
I0729 23:29:29.699404       1 clone.go:29] Git clone failed: exec: "git": executable file not found in $PATH
I0729 23:29:29.699428       1 cleanup.go:23] Removing temporary directory /tmp/sti962730161
I0729 23:29:29.699442       1 fs.go:99] Removing directory '/tmp/sti962730161'
F0729 23:29:29.703562       1 builder.go:65] Build error: exec: "git": executable file not found in $PATH

Version-Release number of selected component (if applicable):
openshift v3.0.1.0-503-g7cc6deb
kubernetes v1.0.0
rcm-img-docker01.build.eng.bos.redhat.com:5001/openshift3/ose-sti-builder:v3.0.1.0 (d3594f340b5e)

How reproducible:
always

steps to Reproduce:
1. Create a new project
2. Build with sample S2I json file 
oc new-app https://raw.githubusercontent.com/openshift/origin/master/examples/sample-app/application-template-stibuild.json
3. Watch the build status and build-log

Actual results:
Build will go failed due to cannot find git in $PATH.

Expected results:
It should succeed.

Additional info:
# docker pull registry.access.redhat.com/openshift3/ose-sti-builder
#  docker tag -f registry.access.redhat.com/openshift3/ose-sti-builder  registry.access.redhat.com/openshift3/ose-sti-builder:v3.0.1.0
Then re-build app, everything is working well.
so  the root cause is  rcm-img-docker01.build.eng.bos.redhat.com:5001/openshift3/ose-sti-builder:v3.0.1.0  (d3594f340b5e) has issues.