$ git clone -n https://src.fedoraproject.org/rpms/noggin.git /var/lib/mock/f40-build-2220578-52665/root/chroot_tmpdir/scmroot/noggin
Cloning into '/var/lib/mock/f40-build-2220578-52665/root/chroot_tmpdir/scmroot/noggin'...
$ git fetch origin 65b9393141751029d31012689185bf9104a3a978:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/noggin
 * [new ref]         65b9393141751029d31012689185bf9104a3a978 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 65b9393 Rebase to 1.8.0