$ git clone -n https://src.fedoraproject.org/rpms/ocaml-crunch.git /var/lib/mock/f41-build-851667-166034/root/chroot_tmpdir/scmroot/ocaml-crunch
Cloning into '/var/lib/mock/f41-build-851667-166034/root/chroot_tmpdir/scmroot/ocaml-crunch'...
$ git fetch origin e5f1152da9f9e86a82ffa6530f5f67d072b37005:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/ocaml-crunch
 * [new ref]         e5f1152da9f9e86a82ffa6530f5f67d072b37005 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at e5f1152 Rebuild for ocaml-ptime 1.2.0