$ git clone -n https://src.fedoraproject.org/rpms/tcpdump.git /var/lib/mock/f31-build-74693-31170/root/thebuilddir/tmp/scmroot/tcpdump
Cloning into '/var/lib/mock/f31-build-74693-31170/root/thebuilddir/tmp/scmroot/tcpdump'...
$ git reset --hard 6570751125c37d841895df55da5bb39c9775782f
HEAD is now at 6570751 - Rebuilt for https://fedoraproject.org/wiki/Fedora_31_Mass_Rebuild