$ git clone -n https://src.fedoraproject.org/rpms/iwd.git /var/lib/mock/f40-build-763210-122451/root/chroot_tmpdir/scmroot/iwd
Cloning into '/var/lib/mock/f40-build-763210-122451/root/chroot_tmpdir/scmroot/iwd'...
$ git fetch origin c4dd29347ffe3be74b97f90af9fe4aecaffde48a:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/iwd
 * [new ref]         c4dd29347ffe3be74b97f90af9fe4aecaffde48a -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at c4dd293 2.9