$ git clone -n https://src.fedoraproject.org/rpms/hatch.git /var/lib/mock/f40-build-2146132-50883/root/chroot_tmpdir/scmroot/hatch
Cloning into '/var/lib/mock/f40-build-2146132-50883/root/chroot_tmpdir/scmroot/hatch'...
$ git fetch origin a78cbc7dad315f6809395c4bc52b0a3442d76a86:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/hatch
 * [new ref]         a78cbc7dad315f6809395c4bc52b0a3442d76a86 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at a78cbc7 Update to 1.9.1 (close RHBZ#2255798)