$ git clone -n https://src.fedoraproject.org/rpms/ghc-smallcheck.git /var/lib/mock/f40-build-2158597-50939/root/chroot_tmpdir/scmroot/ghc-smallcheck
Cloning into '/var/lib/mock/f40-build-2158597-50939/root/chroot_tmpdir/scmroot/ghc-smallcheck'...
$ git fetch origin 7de09dca1e5bee652d9ecaf9d4aabfb41e92a5f5:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/ghc-smallcheck
 * [new ref]         7de09dca1e5bee652d9ecaf9d4aabfb41e92a5f5 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 7de09dc https://hackage.haskell.org/package/smallcheck-1.2.1.1/changelog