$ git clone -n https://src.fedoraproject.org/rpms/ghc-stm-chans.git /var/lib/mock/f31-build-117010-34599/root/chroot_tmpdir/scmroot/ghc-stm-chans
Cloning into '/var/lib/mock/f31-build-117010-34599/root/chroot_tmpdir/scmroot/ghc-stm-chans'...
$ git reset --hard a35cce38c5feeaf1f0167adf0f55c08328943bec
HEAD is now at a35cce3 BR prof for lib and static for executable