$ git clone -n https://src.fedoraproject.org/rpms/ghc-smallcheck.git /var/lib/mock/f41-build-839663-160289/root/chroot_tmpdir/scmroot/ghc-smallcheck
Cloning into '/var/lib/mock/f41-build-839663-160289/root/chroot_tmpdir/scmroot/ghc-smallcheck'...
$ git fetch origin e347b5165cf11da02c10db6a0e2eccc68eb4e97a:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/ghc-smallcheck
 * [new ref]         e347b5165cf11da02c10db6a0e2eccc68eb4e97a -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at e347b51 bump release