$ git clone -n https://src.fedoraproject.org/rpms/t4k_common.git /var/lib/mock/f31-build-54689-28036/root/chroot_tmpdir/scmroot/t4k_common
Cloning into '/var/lib/mock/f31-build-54689-28036/root/chroot_tmpdir/scmroot/t4k_common'...
$ git reset --hard 2169541c7cf8bdb657a10dc955589aeb3c29800a
HEAD is now at 2169541 - Rebuilt for https://fedoraproject.org/wiki/Fedora_30_Mass_Rebuild