$ git clone -n https://src.fedoraproject.org/rpms/bcd.git /var/lib/mock/f40-build-801384-143775/root/chroot_tmpdir/scmroot/bcd
Cloning into '/var/lib/mock/f40-build-801384-143775/root/chroot_tmpdir/scmroot/bcd'...
$ git fetch origin a96d7aff9281054b8efe1630deefcfb74ca1ae8b:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/bcd
 * [new ref]         a96d7aff9281054b8efe1630deefcfb74ca1ae8b -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at a96d7af Bump changelog