$ git clone -n https://src.fedoraproject.org/rpms/mongoose.git /var/lib/mock/f31-build-56289-28213/root/thebuilddir/tmp/scmroot/mongoose
Cloning into '/var/lib/mock/f31-build-56289-28213/root/thebuilddir/tmp/scmroot/mongoose'...
$ git reset --hard 621a159bd28face411fec73e1f19aa7a5e2d3788
HEAD is now at 621a159 - Rebuilt for https://fedoraproject.org/wiki/Fedora_30_Mass_Rebuild