$ git clone -n https://src.fedoraproject.org/rpms/ghc-regex-posix.git /var/lib/mock/f40-build-742446-110760/root/chroot_tmpdir/scmroot/ghc-regex-posix
Cloning into '/var/lib/mock/f40-build-742446-110760/root/chroot_tmpdir/scmroot/ghc-regex-posix'...
$ git reset --hard ed062242fa702967b5b706a0e3ac7a804e4998e7
HEAD is now at ed06224 revised .cabal file