$ git clone -n https://src.fedoraproject.org/rpms/guile-lib.git /var/lib/mock/f31-build-51007-27467/root/chroot_tmpdir/scmroot/guile-lib
Cloning into '/var/lib/mock/f31-build-51007-27467/root/chroot_tmpdir/scmroot/guile-lib'...
$ git reset --hard c35619855e476f724d574892233efb17efc8dd7a
HEAD is now at c356198 - Rebuilt for https://fedoraproject.org/wiki/Fedora_29_Mass_Rebuild