$ git clone -n https://src.fedoraproject.org/rpms/qcad.git /var/lib/mock/f39-build-2261006-54414/root/chroot_tmpdir/scmroot/qcad
Cloning into '/var/lib/mock/f39-build-2261006-54414/root/chroot_tmpdir/scmroot/qcad'...
$ git fetch origin 34644fe788412af1dd37c59a88de0a56e08f0290:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/qcad
 * [new ref]         34644fe788412af1dd37c59a88de0a56e08f0290 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 34644fe Fix BuildRequires packages