$ git clone -n https://src.fedoraproject.org/rpms/hatch.git /var/lib/mock/f40-build-2621833-64806/root/chroot_tmpdir/scmroot/hatch
Cloning into '/var/lib/mock/f40-build-2621833-64806/root/chroot_tmpdir/scmroot/hatch'...
$ git fetch origin 1e0e2bb16c1db1a3d58b25394894a449f53939f7:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/hatch
 * [new ref]         1e0e2bb16c1db1a3d58b25394894a449f53939f7 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 1e0e2bb Update to 1.9.4 (close RHBZ#2269103)