$ git clone -n https://src.fedoraproject.org/rpms/libmatroska.git /var/lib/mock/f31-build-99834-33204/root/chroot_tmpdir/scmroot/libmatroska
Cloning into '/var/lib/mock/f31-build-99834-33204/root/chroot_tmpdir/scmroot/libmatroska'...
$ git reset --hard 7ebd623ff2830eb0cca996a3273056a2077f74ce
HEAD is now at 7ebd623 - Rebuilt for https://fedoraproject.org/wiki/Fedora_31_Mass_Rebuild