$ git clone -n https://src.fedoraproject.org/rpms/svt-av1.git /var/lib/mock/f31-build-74290-31107/root/thebuilddir/tmp/scmroot/svt-av1
Cloning into '/var/lib/mock/f31-build-74290-31107/root/thebuilddir/tmp/scmroot/svt-av1'...
$ git reset --hard 974fe2b7c43b4709ca57c46781f28f548fa875b3
HEAD is now at 974fe2b - Rebuilt for https://fedoraproject.org/wiki/Fedora_31_Mass_Rebuild