$ git clone -n https://src.fedoraproject.org/rpms/lifeograph.git /var/lib/mock/f41-build-side-1-2647784-27313/root/chroot_tmpdir/scmroot/lifeograph
Cloning into '/var/lib/mock/f41-build-side-1-2647784-27313/root/chroot_tmpdir/scmroot/lifeograph'...
$ git fetch origin c536720d61663a135569e6ea1d1be59ebff163a3:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/lifeograph
 * [new ref]         c536720d61663a135569e6ea1d1be59ebff163a3 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at c536720 convert GPLv3+ license to SPDX