$ git clone -n https://src.fedoraproject.org/rpms/ghc-extensible-exceptions.git /var/lib/mock/f31-build-111434-34163/root/chroot_tmpdir/scmroot/ghc-extensible-exceptions
Cloning into '/var/lib/mock/f31-build-111434-34163/root/chroot_tmpdir/scmroot/ghc-extensible-exceptions'...
$ git reset --hard 10d00c3cf7852d535d2913471552d746096abeaa
HEAD is now at 10d00c3 BR prof for lib and static for executable