$ git clone -n https://src.fedoraproject.org/rpms/xxhash.git /var/lib/mock/f31-build-71636-30668/root/chroot_tmpdir/scmroot/xxhash
Cloning into '/var/lib/mock/f31-build-71636-30668/root/chroot_tmpdir/scmroot/xxhash'...
$ git reset --hard 28a06876a940d4eea00f9deafe95bd3799c19cdc
HEAD is now at 28a0687 - Rebuilt for https://fedoraproject.org/wiki/Fedora_31_Mass_Rebuild