$ git clone -n https://src.fedoraproject.org/rpms/common-lisp-controller.git /var/lib/mock/f41-build-1290516-23344/root/chroot_tmpdir/scmroot/common-lisp-controller
Cloning into '/var/lib/mock/f41-build-1290516-23344/root/chroot_tmpdir/scmroot/common-lisp-controller'...
$ git fetch origin ab0a6d6ff7ec6a07f4f96e80c45da005ca2a39d9:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/common-lisp-controller
 * [new ref]         ab0a6d6ff7ec6a07f4f96e80c45da005ca2a39d9 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at ab0a6d6 Eliminate use of obsolete %patchN syntax (#2283636)