$ git clone -n https://src.fedoraproject.org/rpms/aj-snapshot.git /var/lib/mock/f31-build-52509-27679/root/thebuilddir/tmp/scmroot/aj-snapshot
Cloning into '/var/lib/mock/f31-build-52509-27679/root/thebuilddir/tmp/scmroot/aj-snapshot'...
$ git reset --hard 72f2cc91f03b57469d585a389fe94f81ab398009
HEAD is now at 72f2cc9 - Rebuilt for https://fedoraproject.org/wiki/Fedora_29_Mass_Rebuild