$ git clone -n https://src.fedoraproject.org/rpms/ghc-haskell-src-exts.git /var/lib/mock/f31-build-94021-32455/root/chroot_tmpdir/scmroot/ghc-haskell-src-exts
Cloning into '/var/lib/mock/f31-build-94021-32455/root/chroot_tmpdir/scmroot/ghc-haskell-src-exts'...
$ git reset --hard 546ab5683ee1a55ab63088418a686f5f339789aa
HEAD is now at 546ab56 BR prof for lib and static for executable