$ git clone -n https://src.fedoraproject.org/rpms/fedora-release.git /var/lib/mock/f38-build-side-42-init-devel-851319-28425/root/chroot_tmpdir/scmroot/fedora-release
Cloning into '/var/lib/mock/f38-build-side-42-init-devel-851319-28425/root/chroot_tmpdir/scmroot/fedora-release'...
$ git fetch origin 261316fbfd7673859a9c263623d9dfb4eaab33ab:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/fedora-release
 * [new ref]         261316fbfd7673859a9c263623d9dfb4eaab33ab -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 261316f Set release to start at 1 for final release.