simplify handling of eth2-clients/eth2-testnets repo [skip ci]

scripts/connect_to_testnet.nims

@@ -27,18 +27,9 @@ cli do (testnetName {.argument.}: string):
     buildDir = rootDir / "build"
     allTestnetsDir = buildDir / testnetsRepo
 
-  if not dirExists(allTestnetsDir):
+  rmDir(allTestnetsDir)
   cd buildDir
-    exec &"git clone {testnetsRepoGitUrl}"
+  exec &"git clone --quiet {testnetsRepoGitUrl}"
-
-  cd allTestnetsDir
-  # Drop all local modifications to make sure the next
-  # commands won't fail:
-  exec  "git reset --hard HEAD"
-  # Go in detached state, so we don't try to
-  exec  "git checkout --detach"
-  exec &"git fetch -f {testnetsRepoGitUrl} master:master"
-  exec  "git checkout master"
 
   let testnetDir = allTestnetsDir / team / testnet
   if not dirExists(testnetDir):

scripts/reset_testnet.sh

@@ -33,17 +33,9 @@ while true; do
     esac
 done
 
-if [[ ! -d "$ETH2_TESTNETS"  ]]; then
+rm -rf "$ETH2_TESTNETS"
-  git clone git@github.com:eth2-clients/eth2-testnets "$ETH2_TESTNETS"
+# "--depth 1" does not make it faster, for such a small repo
-fi
+git clone --quiet git@github.com:eth2-clients/eth2-testnets "$ETH2_TESTNETS"
-
-pushd "$ETH2_TESTNETS"
-  # Make sure we've checked out the very latest master
-  git reset --hard HEAD
-  git checkout --detach
-  git fetch -f origin master:master
-  git checkout master
-popd
 
 ETH2_TESTNETS_ABS=$(cd "$ETH2_TESTNETS"; pwd)
 NETWORK_DIR_ABS="$ETH2_TESTNETS_ABS/nimbus/$NETWORK_NAME"