$ git clone -n https://src.fedoraproject.org/rpms/hnb.git /var/lib/mock/f41-build-1065818-19550/root/chroot_tmpdir/scmroot/hnb
Cloning into '/var/lib/mock/f41-build-1065818-19550/root/chroot_tmpdir/scmroot/hnb'...
$ git fetch origin f062045fde4e474d962c3edd3d452cf8384128f2:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/hnb
 * [new ref]         f062045fde4e474d962c3edd3d452cf8384128f2 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at f062045 Eliminate use of obsolete %patchN syntax (#2283636)