$ git clone -n https://src.fedoraproject.org/rpms/casync.git /var/lib/mock/f40-build-2336575-59465/root/chroot_tmpdir/scmroot/casync
Cloning into '/var/lib/mock/f40-build-2336575-59465/root/chroot_tmpdir/scmroot/casync'...
$ git fetch origin c12912c35adb862ba17ac9cbc5e2e9b70bc2549c:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/casync
 * [new ref]         c12912c35adb862ba17ac9cbc5e2e9b70bc2549c -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at c12912c Upstream development has stopped. Use one of the reimplementations instead.