$ git clone -n https://src.fedoraproject.org/rpms/t4k_common.git /var/lib/mock/f31-build-99260-33139/root/chroot_tmpdir/scmroot/t4k_common
Cloning into '/var/lib/mock/f31-build-99260-33139/root/chroot_tmpdir/scmroot/t4k_common'...
$ git reset --hard 7a2f870a2083c05faeea7341f9c7745618d8b91b
HEAD is now at 7a2f870 Fix crash.