$ git clone -n https://src.fedoraproject.org/rpms/blitz.git /var/lib/mock/f39-build-1470400-33893/root/chroot_tmpdir/scmroot/blitz
Cloning into '/var/lib/mock/f39-build-1470400-33893/root/chroot_tmpdir/scmroot/blitz'...
$ git fetch origin c1d59e848f7652e7b4328bbbb2c9bdaa7caaf8f0:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/blitz
 * [new ref]         c1d59e848f7652e7b4328bbbb2c9bdaa7caaf8f0 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at c1d59e8 Rebuilt for https://fedoraproject.org/wiki/Fedora_39_Mass_Rebuild