$ git clone -n https://src.fedoraproject.org/rpms/log4cxx.git /var/lib/mock/f31-build-48703-27197/root/thebuilddir/tmp/scmroot/log4cxx
Cloning into '/var/lib/mock/f31-build-48703-27197/root/thebuilddir/tmp/scmroot/log4cxx'...
$ git reset --hard 6f9e9f29a397f584fc4230ab2b37f78340ce9c50
HEAD is now at 6f9e9f2 - Rebuilt for https://fedoraproject.org/wiki/Fedora_30_Mass_Rebuild