$ git clone -n https://src.fedoraproject.org/rpms/libxc.git /var/lib/mock/f31-build-66929-29953/root/chroot_tmpdir/scmroot/libxc
Cloning into '/var/lib/mock/f31-build-66929-29953/root/chroot_tmpdir/scmroot/libxc'...
$ git reset --hard f502b00b7619c5434bd5985431a2905b464a7e9e
HEAD is now at f502b00 - Rebuilt for https://fedoraproject.org/wiki/Fedora_31_Mass_Rebuild