$ git clone -n https://src.fedoraproject.org/rpms/dgit.git /var/lib/mock/f41-build-side-1-2634041-25995/root/chroot_tmpdir/scmroot/dgit
Cloning into '/var/lib/mock/f41-build-side-1-2634041-25995/root/chroot_tmpdir/scmroot/dgit'...
$ git fetch origin 705ee636d40e11a8ceabe5740d79ab2d787de279:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/dgit
 * [new ref]         705ee636d40e11a8ceabe5740d79ab2d787de279 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 705ee63 convert GPLv3+ license to SPDX