$ git clone -n https://src.fedoraproject.org/rpms/ocaml-cryptokit.git /var/lib/mock/f40-build-2221001-52673/root/chroot_tmpdir/scmroot/ocaml-cryptokit
Cloning into '/var/lib/mock/f40-build-2221001-52673/root/chroot_tmpdir/scmroot/ocaml-cryptokit'...
$ git fetch origin 7593d59d313da7072d288f1b67cff9d4f0d15b65:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/ocaml-cryptokit
 * [new ref]         7593d59d313da7072d288f1b67cff9d4f0d15b65 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 7593d59 Bump release and rebuild