$ git clone -n https://src.fedoraproject.org/forks/decathorpe/rpms/rust-oo7.git /var/lib/mock/f43-build-60950315-6586678/root/chroot_tmpdir/scmroot/rust-oo7
Cloning into '/var/lib/mock/f43-build-60950315-6586678/root/chroot_tmpdir/scmroot/rust-oo7'...
$ git fetch origin 5fb57b2f38cef9184dfc3a5ae5b2754e7ffefbcc:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/forks/decathorpe/rpms/rust-oo7
 * [new ref]         5fb57b2f38cef9184dfc3a5ae5b2754e7ffefbcc -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 5fb57b2 Update to version 0.4.3; Fixes RHBZ#2345917