$ git clone -n https://src.fedoraproject.org/rpms/frama-c.git /var/lib/mock/f41-build-855810-167429/root/chroot_tmpdir/scmroot/frama-c
Cloning into '/var/lib/mock/f41-build-855810-167429/root/chroot_tmpdir/scmroot/frama-c'...
$ git fetch origin 2a7ce636f590082629523c2e758334a3cad70e84:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/frama-c
 * [new ref]         2a7ce636f590082629523c2e758334a3cad70e84 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 2a7ce63 Rebuild for ocaml-yaml with ocaml-ctypes 0.23.0