$ git clone -n https://src.fedoraproject.org/rpms/mbpfan.git /var/lib/mock/f41-build-side-1-2965554-35794/root/chroot_tmpdir/scmroot/mbpfan
Cloning into '/var/lib/mock/f41-build-side-1-2965554-35794/root/chroot_tmpdir/scmroot/mbpfan'...
$ git fetch origin cf5fe86a7aa7b68179c74873987b9c0279d5890a:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/mbpfan
 * [new ref]         cf5fe86a7aa7b68179c74873987b9c0279d5890a -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at cf5fe86 convert GPLv3 license to SPDX