$ git clone -n https://src.fedoraproject.org/rpms/ghc-listsafe.git /var/lib/mock/f41-build-837641-159296/root/chroot_tmpdir/scmroot/ghc-listsafe
Cloning into '/var/lib/mock/f41-build-837641-159296/root/chroot_tmpdir/scmroot/ghc-listsafe'...
$ git fetch origin 31bb9e20fb2f2f66a6efc58bbda1c9ac9294fb90:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/ghc-listsafe
 * [new ref]         31bb9e20fb2f2f66a6efc58bbda1c9ac9294fb90 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 31bb9e2 bump release