$ git clone -n https://src.fedoraproject.org/rpms/frama-c.git /var/lib/mock/f39-build-2518733-61728/root/chroot_tmpdir/scmroot/frama-c
Cloning into '/var/lib/mock/f39-build-2518733-61728/root/chroot_tmpdir/scmroot/frama-c'...
$ git fetch origin cc9d38e923e8828072a8595365a60ff705892902:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/frama-c
 * [new ref]         cc9d38e923e8828072a8595365a60ff705892902 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at cc9d38e Version 28.1