$ git clone -n https://src.fedoraproject.org/rpms/firefox-pkcs11-loader.git /var/lib/mock/f31-build-67056-29978/root/chroot_tmpdir/scmroot/firefox-pkcs11-loader
Cloning into '/var/lib/mock/f31-build-67056-29978/root/chroot_tmpdir/scmroot/firefox-pkcs11-loader'...
$ git reset --hard 63bf8a0db20a7b7188f311ed20af4f6ad9fd9f7f
HEAD is now at 63bf8a0 - Rebuilt for https://fedoraproject.org/wiki/Fedora_31_Mass_Rebuild