# Can our Builder build see our Git revision hash?
**URL:** https://discourse.chef.io/t/can-our-builder-build-see-our-git-revision-hash/18908
**Category:** Habitat Help
**Created:** [April 18, 2018, 3:28pm UTC](https://discourse.chef.io/t/can-our-builder-build-see-our-git-revision-hash/18908 "2018-04-18T15:28:32Z")
**Posts on this page:** 6
**Page:** 1
### Author:  [@smartb-pair](https://discourse.chef.io/u/smartb-pair)
#### Post date: [April 18, 2018, 3:28pm UTC](https://discourse.chef.io/t/can-our-builder-build-see-our-git-revision-hash/18908/1 "2018-04-18T15:28:32Z")
We’d love to be able to send notifications to various monitoring services that would record the Git revision that’s been deployed or packaged. Is there a way to see the Git revision from inside the build Studio or from inside Builder when a GitHub webhook has triggered a build?
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### Author:  [@joshb](https://discourse.chef.io/u/joshb)
#### Post date: [April 18, 2018, 4:43pm UTC](https://discourse.chef.io/t/can-our-builder-build-see-our-git-revision-hash/18908/2 "2018-04-18T16:43:23Z")
As far as I can tell, no, this functionality doesn’t currently exist. We’re always open to new feature requests, though.
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### Author:  [@baumanj](https://discourse.chef.io/u/baumanj)
#### Post date: [April 18, 2018, 6:21pm UTC](https://discourse.chef.io/t/can-our-builder-build-see-our-git-revision-hash/18908/3 "2018-04-18T18:21:30Z")
I haven’t fully explored this, but I think you should be able to add `core/git` as a build dependency and then stash the output of
```
git rev-parse HEAD
```
somewhere in the build output to be accessed later. Would that work for your purposes, @smartb-pair?
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### Author:  [@cnunciato](https://discourse.chef.io/u/cnunciato)
#### Post date: [April 30, 2018, 11:32pm UTC](https://discourse.chef.io/t/can-our-builder-build-see-our-git-revision-hash/18908/4 "2018-04-30T23:32:00Z")
This comes up all the time and would be really useful. I've created an issue for it here:
>
>
> This request comes up often:
> https://forums.habitat.sh/t/can-our-builder-build-see-our-git-revision-hash
> It'd be nice to capture the SHA (e.g., from a webhook or CLI argument) and expose it...
---
### Author:  [@smartb-pair](https://discourse.chef.io/u/smartb-pair)
#### Post date: [May 3, 2018, 2:18pm UTC](https://discourse.chef.io/t/can-our-builder-build-see-our-git-revision-hash/18908/5 "2018-05-03T14:18:09Z")
Yes, that does work and we can probably use this for a few things. Thanks!
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### Author:  [@Steve\_Hummingbird](https://discourse.chef.io/u/Steve_Hummingbird)
#### Post date: [June 27, 2018, 11:34am UTC](https://discourse.chef.io/t/can-our-builder-build-see-our-git-revision-hash/18908/6 "2018-06-27T11:34:00Z")
In case someone comes along here searching for a solution - especially on how to “stash” the output. I was able to use the `do_build()` method to supply the git revision:
```
do_build() {
set_runtime_env GIT_REVISION $(git rev-parse HEAD 2>&1)
}
```
The 2\>&1 redirect should not be totally necessary though.
And in the corresponding hook I am including it like any other environment variable in a curl command to notify about the deployment:
`curl https://monitoring.domain -F revision=$GIT_REVISION`
If anyone comes across a better solution, please do let us know.