$ git clone -n https://src.fedoraproject.org/rpms/hpx.git /var/lib/mock/f40-build-1828441-24920/root/chroot_tmpdir/scmroot/hpx
Cloning into '/var/lib/mock/f40-build-1828441-24920/root/chroot_tmpdir/scmroot/hpx'...
$ git fetch origin 2dc5a973f22362aecd9c6d835ee29114ab9492d7:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/hpx
 * [new ref]         2dc5a973f22362aecd9c6d835ee29114ab9492d7 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 2dc5a97 Bump to HPX 1.10.0