So, after waiting for a while it looks like there's no answer, however, since you're already here... Let's avoid this
So here you have piece of bash code to generate a table with the correlation between the dates from the file with your extracted data and the commits of the project.
Probably not the best approach neither the fastest one, but it will give you what you need :)
Save in a file.sh and use as: ./file.sh GithubUser/ProjectName YourFileWithTheExtractedData.csv
#!/bin/bash
gitproject="git@github.com:${1}.git"
gitfolder=$(echo $gitproject | sed -E 's/(.+)\/(.+\.git$)/\2/g')
workdir="$(pwd)"
measuresFile=$2
if [ ! -d "$workdir/$gitfolder" ];
then
$(git -C $workdir clone -q --bare $gitproject)
fi
echo '"sonar-timestamp","git-timestamp","commit-hash"' >> $workdir/Hashes_$2
cat $workdir/$measuresFile | grep -Eo '"[[:digit:]]{4}-[[:digit:]]{2}-[[:digit:]]{2}T[[:digit:]]{2}:[[:digit:]]{2}:[[:digit:]]{2}\+[[:digit:]]{4}",' | sed -E 's/"|",//g' | sort -u >> $workdir/TMP_Hashes_$2
for i in $( cat $workdir/TMP_Hashes_$2 | sort -u ); do echo $(echo $i | date '+%s' -f - ),"$i" >> $workdir/Hashes_$2 ; done
rm -rf $workdir/TMP_Hashes_$2
gHashes=( $(TZ=Europe/London git -C $workdir/$gitfolder log --all --date=format-local:%Y-%m-%dT%H:%M:%S%z --format=%ad\ %H | sort | tr '\n' ' ') )
COUNTER=0
while (("$COUNTER" < "${#gHashes[@]}"))
do
sust=$(date -d "${gHashes[$COUNTER]}" '+%s')
notInc=$(cat $workdir/Hashes_$2 | grep -o "^${sust}" | wc -l )
$(sed -i -E "s/(^${sust}),(.+)/\"\2\",\"${gHashes[($COUNTER)]}\",\"${gHashes[($COUNTER + 1)]}\"/g" $workdir/Hashes_$2)
if (( "$notInc" == "0" ));
then
rHashes+=( "${gHashes[($COUNTER)]}" "${gHashes[($COUNTER + 1)]}" )
fi
let COUNTER=COUNTER+2
done
$(sed -i -E "s/(^[0-9]+),(.+)/\"\2\",\"\",\"\"/g" $workdir/Hashes_$2)
COUNTER=0
while (("$COUNTER" < "${#rHashes[@]}"))
do
echo "\"\",\"${rHashes[($COUNTER)]}\",\"${rHashes[($COUNTER + 1)]}\"" >> $workdir/Hashes_$2
let COUNTER=COUNTER+2
done