$ git clone -n https://src.fedoraproject.org/rpms/libast.git /var/lib/mock/f31-build-68003-30134/root/chroot_tmpdir/scmroot/libast
Cloning into '/var/lib/mock/f31-build-68003-30134/root/chroot_tmpdir/scmroot/libast'...
$ git reset --hard 3577c76bf26500301d487b396e4c2e2b80a03f0c
HEAD is now at 3577c76 - Rebuilt for https://fedoraproject.org/wiki/Fedora_31_Mass_Rebuild