$ git clone -n https://src.fedoraproject.org/rpms/xxdiff.git /var/lib/mock/f31-build-71635-30668/root/chroot_tmpdir/scmroot/xxdiff
Cloning into '/var/lib/mock/f31-build-71635-30668/root/chroot_tmpdir/scmroot/xxdiff'...
$ git reset --hard 674e640426fac67db605ef01565d6c5ce2b7f910
HEAD is now at 674e640 - Rebuilt for https://fedoraproject.org/wiki/Fedora_31_Mass_Rebuild