$ git clone -n https://src.fedoraproject.org/rpms/virtualbox-guest-additions.git /var/lib/mock/f31-build-98236-33039/root/chroot_tmpdir/scmroot/virtualbox-guest-additions
Cloning into '/var/lib/mock/f31-build-98236-33039/root/chroot_tmpdir/scmroot/virtualbox-guest-additions'...
$ git reset --hard 7b487097c51dbed2fa63aa5df8f542949da744fb
HEAD is now at 7b48709 - Rebuilt for https://fedoraproject.org/wiki/Fedora_31_Mass_Rebuild