$ git clone -n https://src.fedoraproject.org/rpms/plasma-vault.git /var/lib/mock/f42-build-862480-170829/root/chroot_tmpdir/scmroot/plasma-vault
Cloning into '/var/lib/mock/f42-build-862480-170829/root/chroot_tmpdir/scmroot/plasma-vault'...
$ git fetch origin d0a9d79e30ef1da8c9c67a176485ae61e650d7df:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/plasma-vault
 * [new ref]         d0a9d79e30ef1da8c9c67a176485ae61e650d7df -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at d0a9d79 6.2.4