$ git clone -n https://src.fedoraproject.org/rpms/volk.git /var/lib/mock/f40-build-2580391-62379/root/chroot_tmpdir/scmroot/volk
Cloning into '/var/lib/mock/f40-build-2580391-62379/root/chroot_tmpdir/scmroot/volk'...
$ git fetch origin 8dbae38dd9fff219b35f6c9a4b54f319ac1e46df:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/volk
 * [new ref]         8dbae38dd9fff219b35f6c9a4b54f319ac1e46df -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 8dbae38 New version