Update git clone details in Ep.1

_episodes/01-first_benchmark.md

@@ -19,9 +19,14 @@ Benchmarks are currently organized into two repositories:
 Let's make a detector benchmark. We start by cloning the git repository
 
 ```bash
-git clone git@github.com:eic/detector_benchmarks.git
+git clone https://github.com/eic/detector_benchmarks.git
 cd detector_benchmarks
 ```
+or 
+```bash
+git clone https://github.com/eic/physics_benchmarks.git
+cd physics_benchmarks
+```
 
 (If you get an error here, you might need to set up your SSH keys.)
 
@@ -50,6 +55,7 @@ mkdir benchmarks/backwards_ecal
 
 The Continuous Integration system needs to know what steps it has to execute. This is specified using YAML files. Create a file `benchmarks/backwards_ecal/config.yml` with the following contents:
 
+For a detector benchmark:
 ~~~
 sim:ecal_backwards_electron:
   extends: .det_benchmark 
@@ -75,6 +81,54 @@ bench:ecal_backwards_resolution:
 ~~~
 {: .language-yaml }
 
+For a physics benchmark:
+~~~
+your_benchmark:compile:
+  extends: .phy_benchmark 
+  stage: compile
+  script:
+    - echo "You can compile your code here!"
+
+your_benchmark:generate:
+  extends: .phy_benchmark 
+  stage: generate
+  script:
+    - echo "I will generate events here!"
+    - echo "Add event-generator code to do this"
+
+your_benchmark:simulate:
+  extends: .phy_benchmark
+  stage: simulate
+  script:
+    - echo "I will simulate detector response here!"
+
+your_benchmark:reconstruct:
+  extends: .phy_benchmark
+  stage: reconstruct
+  script:
+    - echo "Event reconstruction here!"
+
+your_benchmark:analyze:
+  extends: .phy_benchmark
+  stage: analyze
+  needs:
+    - ["your_benchmark:reconstruct"]
+  script:
+    - echo "I will analyze events here!"
+    - echo "This step requires that the reconstruct step be completed"
+
+your_benchmark:collect
+  extends: .phy_benchmark
+  stage: collect
+  needs:
+    - ["your_benchmark:analyze"]
+  script:
+    - echo "I will collect results here!"
+    - echo "This step requires that the analyze step be completed"
+
+~~~
+{: .language-yaml }
+
 The basic idea here is that we define three jobs to be run in two steps. The reason for the separation is to allow parallel execution and for them to be presented nicely in the user interface.
 
 Since we've just created a new file, we need to let git know about it by staging it: