$ git clone -n https://src.fedoraproject.org/rpms/iwd.git /var/lib/mock/f40-build-1292891-23380/root/chroot_tmpdir/scmroot/iwd
Cloning into '/var/lib/mock/f40-build-1292891-23380/root/chroot_tmpdir/scmroot/iwd'...
$ git fetch origin 87fc6da0d55f480eb979a11abb6285bb4fff6205:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/iwd
 * [new ref]         87fc6da0d55f480eb979a11abb6285bb4fff6205 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 87fc6da 2.18