$ git clone -n https://src.fedoraproject.org/rpms/vala.git /var/lib/mock/f40-build-1443772-23577/root/chroot_tmpdir/scmroot/vala
Cloning into '/var/lib/mock/f40-build-1443772-23577/root/chroot_tmpdir/scmroot/vala'...
$ git fetch origin 7c30733f6bb75abdb05394c988be8dd0df0f397f:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/vala
 * [new ref]         7c30733f6bb75abdb05394c988be8dd0df0f397f -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 7c30733 Update to 0.56.17