$ git clone -n https://src.fedoraproject.org/rpms/envision.git /var/lib/mock/f42-build-side-1-3506003-45995/root/chroot_tmpdir/scmroot/envision
Cloning into '/var/lib/mock/f42-build-side-1-3506003-45995/root/chroot_tmpdir/scmroot/envision'...
$ git fetch origin 32a0b6673e4376aabacd6628961baaf4676119a5:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/envision
 * [new ref]         32a0b6673e4376aabacd6628961baaf4676119a5 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 32a0b66 Update to 3.1.0 (fedora#2358291).