$ git clone -n https://src.fedoraproject.org/rpms/volk.git /var/lib/mock/f38-build-side-42-init-devel-928931-28746/root/chroot_tmpdir/scmroot/volk
Cloning into '/var/lib/mock/f38-build-side-42-init-devel-928931-28746/root/chroot_tmpdir/scmroot/volk'...
$ git fetch origin 2d615450000463319d86ac0d8bb8d772477368b3:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/volk
 * [new ref]         2d615450000463319d86ac0d8bb8d772477368b3 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 2d61545 New version