$ git clone -n https://src.fedoraproject.org/rpms/volk.git /var/lib/mock/f39-build-1512511-35565/root/chroot_tmpdir/scmroot/volk
Cloning into '/var/lib/mock/f39-build-1512511-35565/root/chroot_tmpdir/scmroot/volk'...
$ git fetch origin 9a6a90294bd0bd94a0e77284d9ccb1d50207cf32:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/volk
 * [new ref]         9a6a90294bd0bd94a0e77284d9ccb1d50207cf32 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 9a6a902 Add BuildRequires on cpu_features, fix rhbz#2245047