$ git clone -n https://src.fedoraproject.org/rpms/rust-minspan.git /var/lib/mock/f42-build-side-1-3588352-46945/root/chroot_tmpdir/scmroot/rust-minspan
Cloning into '/var/lib/mock/f42-build-side-1-3588352-46945/root/chroot_tmpdir/scmroot/rust-minspan'...
$ git fetch origin 0a9c704db116531a45da6d3f9161b65d3d3812ea:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/rust-minspan
 * [new ref]         0a9c704db116531a45da6d3f9161b65d3d3812ea -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 0a9c704 Update to version 0.1.5; Fixes RHBZ#2363244