diff --git a/Externals_CAM.cfg b/Externals_CAM.cfg
index 463f3541e7..795ca77b07 100644
--- a/Externals_CAM.cfg
+++ b/Externals_CAM.cfg
@@ -13,24 +13,19 @@ local_path = src/physics/carma/base
 required = True
 
 [cosp2]
-protocol = svn
-tag = v2.1.4cesm/src
-repo_url = https://github.com/CFMIP/COSPv2.0/tags/
+protocol = git
+tag = v2.1.4cesm
+repo_url = https://github.com/CFMIP/COSPv2.0
 local_path = src/physics/cosp2/src
+sparse = ../.cosp_sparse_checkout
 required = True
 
 [clubb]
-protocol = svn
-tag = clubb_4ncar_20221129_59cb19f_20230330_branchtag/src/CLUBB_core
-repo_url = https://github.com/larson-group/clubb_release/tags/
+protocol = git
+tag = clubb_4ncar_20221129_59cb19f_20230330_branchtag
+repo_url = https://github.com/larson-group/clubb_release
 local_path = src/physics/clubb
-required = True
-
-[silhs]
-protocol = svn
-tag = clubb_4ncar_20221129_59cb19f_20230330_branchtag/src/SILHS
-repo_url = https://github.com/larson-group/clubb_release/tags/
-local_path = src/physics/silhs
+sparse = ../.clubb_sparse_checkout
 required = True
 
 [pumas]
diff --git a/bld/configure b/bld/configure
index 06446ef39b..aab6d47985 100755
--- a/bld/configure
+++ b/bld/configure
@@ -2194,11 +2194,11 @@ sub write_filepath
     }
 
     if ($clubb_sgs) {
-       print $fh "$camsrcdir/src/physics/clubb\n";
+       print $fh "$camsrcdir/src/physics/clubb/src/CLUBB_core\n";
     }
 
     if ($silhs) {
-       print $fh "$camsrcdir/src/physics/silhs\n";
+       print $fh "$camsrcdir/src/physics/clubb/src/SILHS\n";
     }
 
     if ($phys_pkg eq 'cam_dev') {
@@ -2294,14 +2294,13 @@ sub write_cosp_makefile
 
 CAM_BLD      := $cam_bld
 COSP_PATH    := $cam_dir/src/physics/cosp2
-ISCCP_PATH   := $cam_dir/src/physics/cosp2/src/simulator/icarus
-RS_PATH      := $cam_dir/src/physics/cosp2/src/simulator/quickbeam
-RT_PATH      := $cam_dir/src/physics/cosp2/src/simulator/rttov
-CS_PATH      := $cam_dir/src/physics/cosp2/src/simulator/actsim
-MISR_PATH    := $cam_dir/src/physics/cosp2/src/simulator/MISR_simulator
-MODIS_PATH   := $cam_dir/src/physics/cosp2/src/simulator/MODIS_simulator
-PARASOL_PATH := $cam_dir/src/physics/cosp2/src/simulator/parasol
-
+ISCCP_PATH   := $cam_dir/src/physics/cosp2/src/src/simulator/icarus
+RS_PATH      := $cam_dir/src/physics/cosp2/src/src/simulator/quickbeam
+RT_PATH      := $cam_dir/src/physics/cosp2/src/src/simulator/rttov
+CS_PATH      := $cam_dir/src/physics/cosp2/src/src/simulator/actsim
+MISR_PATH    := $cam_dir/src/physics/cosp2/src/src/simulator/MISR_simulator
+MODIS_PATH   := $cam_dir/src/physics/cosp2/src/src/simulator/MODIS_simulator
+PARASOL_PATH := $cam_dir/src/physics/cosp2/src/src/simulator/parasol
 EOF
 
     # Copy the "template" makefile to the new makefile.
diff --git a/src/physics/.clubb_sparse_checkout b/src/physics/.clubb_sparse_checkout
new file mode 100644
index 0000000000..1299233a5e
--- /dev/null
+++ b/src/physics/.clubb_sparse_checkout
@@ -0,0 +1,2 @@
+src/CLUBB_core
+src/SILHS
diff --git a/src/physics/cosp2/.cosp_sparse_checkout b/src/physics/cosp2/.cosp_sparse_checkout
new file mode 100644
index 0000000000..4f00cd9a73
--- /dev/null
+++ b/src/physics/cosp2/.cosp_sparse_checkout
@@ -0,0 +1 @@
+/src/