$ git clone -n https://src.fedoraproject.org/rpms/plasma-vault.git /var/lib/mock/f40-build-797974-141642/root/chroot_tmpdir/scmroot/plasma-vault
Cloning into '/var/lib/mock/f40-build-797974-141642/root/chroot_tmpdir/scmroot/plasma-vault'...
$ git fetch origin f1f87e9dbf8987098e66cc27f9464046aeb8dfc7:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/plasma-vault
 * [new ref]         f1f87e9dbf8987098e66cc27f9464046aeb8dfc7 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at f1f87e9 6.0.2