$ git clone -n https://src.fedoraproject.org/rpms/imhex.git /var/lib/mock/f40-build-2615926-64258/root/chroot_tmpdir/scmroot/imhex
Cloning into '/var/lib/mock/f40-build-2615926-64258/root/chroot_tmpdir/scmroot/imhex'...
$ git fetch origin e694b08e551b5d10824cc39e6d3b97a8962e8234:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/imhex
 * [new ref]         e694b08e551b5d10824cc39e6d3b97a8962e8234 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at e694b08 update to 1.33.2