$ git clone -n https://src.fedoraproject.org/rpms/kmenuedit.git /var/lib/mock/f42-build-side-1-3577595-46813/root/chroot_tmpdir/scmroot/kmenuedit
Cloning into '/var/lib/mock/f42-build-side-1-3577595-46813/root/chroot_tmpdir/scmroot/kmenuedit'...
$ git fetch origin 6d7857ad60095fb76952400f5f54c943d0fb5159:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/kmenuedit
 * [new ref]         6d7857ad60095fb76952400f5f54c943d0fb5159 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 6d7857a 6.4.1